These standards provide information regarding current Clark Public Utilities standards. They are designed for Clark Public Utilities approved journey line worker contractors and distributors.
| Section Description | Last Revision Date |
|---|---|
| Section 100 - General | 02/11/25 |
| Section 200 - Overhead Basic Units | 02/11/25 |
| Section 310 - Overhead 1 Phase | 02/11/25 |
| Section 320 - Overhead 2 Phase | 02/11/25 |
| Section 330 - Overhead 3 Phase | 02/11/25 |
| Section 340 - Overhead 3 Phase Heavy | 02/11/25 |
| Section 350 - Overhead Fiber Optic | 12/26/22 |
| Section 400 - Overhead ConductorN New Standard R Redrawn Standard C Changed Standard ~ No Change 400 O VERHEAD C ONDUCTOR 1/17/2019 ~ AC Avian Covers ~ BFD Bird Flight Diverters ~ L4 Splicing Guide, Compression Type Sleeves ~ L5 Splicing Guide, Automatic Type ~ L6, L7 Midspan Tap, Flying Tap C LA1, LA2 Lightning Arrester ~ SE10 Mobile Home Trailer Connection ~ SS1 1Ø Slack Span - 2/0 ACSR Max Wire ~ SS2 2Ø Slack Span - 2/0 ACSR Max Wir e ~ SS3 3Ø Slack Span - 2/0 ACSR Max Wire ~ TI2 Single Insulators Two - Piece Tie, Copper Type Conductors ~ TI3 Hot Line Tying Guide, Copper Type Conductors ~ TI4 Conductor Tying Guide, Single Insulator, ACSR or Aluminum ~ TI5 Conductor Tying Guide, Double I nsulator, ACSR or Aluminum DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of AC AC 1 3 CM/DK 10-18-17 400 AVIAN COVERS DEADEND SIDE VIEW TOP VIEW 1 2 Avian, Cover, Deadend Insulator, #6-795 Avian, Cover, Extender, #6-795 1 2897 S/N QTY. ACDE DESCRIPTION Note : 58" 27" Covers required on center phase only if at least 60" horizontal separation between outside phases. For high neutral, cover middle phase and neutral. 1 2914 1 2 Cover only first skirt of insulator Install extender after deadend insulator cover ITEM NO. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of AC AC 2 3 CM/DK 10-18-17 400 AVIAN COVERS SINGLE INSULATOR SIDE VIEW TOP VIEW 42" 1 2 Avian, Cover, Single Post Insulator, #6-795 Avian, Cover, Extender, #6-795 S/N QTY. DESCRIPTION 104" 1 2 2 Notes : 1. Covers required on center phase only if at least 60" horizontal separation between outside phases. For high neutral, cover middle phase and neutral. 2. Use Std ACS for pin insulators and use Std ACSL for line post and vise-top insulators. 1 2 Avian, Cover, Single Pin Insulator, #6-795 Avian, Cover, Extender, #6-795 1 2873 S/N QTY. ACS DESCRIPTION 2 2914 1 2874 ACSL 2 2914 Install extender after insulator cover ITEM NO. ITEM NO. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of AC AC 3 3 CM/DK 10-18-17 400 AVIAN COVERS DOUBLE INSULATOR SIDE VIEW 1 2 TOP VIEW 42" 104" 1 2 Avian, Cover, Double Post Insulator, #6-795 Avian, Cover, Extender, #6-795 1 2876 S/N QTY. ACDL DESCRIPTION 2 2 2914 Notes : 1. Covers required on center phase only if at least 60" horizontal separation between outside phases. For high neutral, cover middle phase and neutral. 2. Use Std ACD for pin insulators and use Std ACDL for line post and vise-top insulators. 1 2 Avian, Cover, Double Pin Insulator, #6-795 Avian, Cover, Extender, #6-795 1 2875 S/N QTY. ACD DESCRIPTION 2 2914 Install extender after insulator cover ITEM NO. ITEM NO. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of BFD BFD 1 7 CM/DK 10-18-17 400 BIRD FLIGHT DIVERTERS 1 OD of Coil Length SCOPE Bird Flight Diverters (BFDs) provide a visual image that helps birds avoid collisions with overhead power lines. When installed, the BFD increases the visible profile of the conductor. MATERIAL BFDs are made from rigid, high impact, UV stabilized PVC material. CPU has standardized on a gray-colored diverter. Studies have determined that color is not a determining factor of BFD H I I H F W L Y H Q H V V 7 K H D U H G H V L J Q H G W R E H X V H G L Q D P E L H Q W W H P S H U D W X U H V U D Q J L Q J I U R P ƒ ) W R ƒ ) Z L W K D P D [ L P X P R S H U D W L Q J W H P S H U D W X U H R I ƒ ) ƒ & Wire Size Stock Number Wire Range (inches)* Length (inches) Coil (inches) MIN MAX #6 Cu N/A** #4 Cu 2883 0.175 0.249 7.00 2.25 #2 ACSR 2884 0.250 0.349 8.5 2.5 2/0 ACSR 2885 0.450 0.599 14.625 4.25 397 AAC*** 2886 0.600 0.770 17.0 4.25 795 AAC*** 2887 0.971 1.121 15.5 4.25 * Range printed on BFDs ** Not manufactured *** Not kept in stock--let Purchasing know in advance so they can be ordered. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of BFD BFD 2 7 CM/DK 10-18-17 400 BIRD FLIGHT DIVERTERS 1 INSTALLATION BFDs are installed on the topmost and outside primary conductors and can be installed on span guys, down guys and static wire. Most migratory birds will flare up and away to avoid collision with a visible conductor. BFDs are not required on lower conductors (neutral, secondary or communication cables). The heliformed rod gripping section (the small end) of the BFD is sized to the diameter of the conductor and can be installed with a hotstick. The positive grip on the conductor ensures that the BFD remains in the applied position and cannot move along the span under aeolian vibration or other conditions. The larger helical end is designed to provide the birds a more visual reference of the line. BFDs should be installed on alternating conductors at 15-foot intervals. See the following drawings for spacing on various framings. All spans that have BFDs installed shall be documented on as-builts and sent to Mapping & Drafting. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of BFD BFD 3 7 CM/DK 10-18-17 400 BIRD FLIGHT DIVERTERS ¡ 1 15' 15' 15' Primary Bird Flight Diverter (BFD) every 15' on alternating wires BFD not required on system neutral BFD not required on comm cables Primary Conductor Note : All spans constructed with BFDs shall be documented by sending construction as-builts to Mapping. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of BFD BFD 4 7 CM/DK 10-18-17 400 BIRD FLIGHT DIVERTERS ¡ : , 7 + + , * + 1 ( 8 7 5 $ / 1 Bird Flight Diverter (BFD) every 15' on alternating wires BFD not required on comm cables 15' 15' 15' Primary Primary and system neutral Conductor System neutral Note : All spans constructed with BFDs shall be documented by sending construction as-builts to Mapping. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of BFD BFD 5 7 CM/DK 10-18-17 400 BIRD FLIGHT DIVERTERS ¡ & 5 2 6 6 $ 5 0 2 5 7 : , * * < 1 Bird Flight Diverter (BFD) every 15' on alternating wires BFD not required on system neutral BFD not required on comm cables 15' 15' 15' Primary Primary Conductor Note : All spans constructed with BFDs shall be documented by sending construction as-builts to Mapping. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of BFD BFD 6 7 CM/DK 10-18-17 400 BIRD FLIGHT DIVERTERS ¡ & 5 2 6 6 $ 5 0 : 7 : , * * < OR SKY PIN 1 Bird Flight Diverter (BFD) every 15' on alternating wires BFD not required on system neutral BFD not required on comm cables 15' 15' 15' Primary Primary Conductor Note : All spans constructed with BFDs shall be documented by sending construction as-builts to Mapping. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of BFD BFD 7 7 CM/DK 10-18-17 400 BIRD FLIGHT DIVERTERS ¡ & 5 2 6 6 $ 5 0 : 2 6 . < 3 , 1 1 Bird Flight Diverter (BFD) every 15' on alternating wires BFD not required on system neutral BFD not required on comm cables 15' 15' 15' Primary Conductor Primary Note : All spans constructed with BFDs shall be documented by sending construction as-builts to Mapping. Marking will vary according to sleeve. COMPRESSION SLEEVE BEFORE SPLICING COMPRESSION SPLICE COMPLETE Number of presses will vary with sleeve length. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of L4 L4 1 1 ELM 1/31/80 400 SPLICING GUIDE COMPRESSION TYPE SLEEVES 1. Clean the wire before making the splice. 2. Begin presses at center of sleeve and work toward ends, press entire length of sleeve. 3. Groove letters printed on sleeves correspond to groove letters printed on tool. Notes : Center stop Automatic Splice Dimples 1/2 L 1/2 L DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of L5 L5 1 1 ELM 1/31/80 400 SPLICING GUIDE, AUTOMATIC TYPE 1. Clean the wire before making the splice. 2. Measure overall length of automatic splice. 3. Check that machined dimples are holding the center stop in the center of the splice. Reject any splice that is not centered. 4. Measure and mark the conductor at a length equal to 1/2 the splice length to ensure complete insertion. 5. Wire brush the conductor to ensure electrical and mechanical contact. 6. Insert the conductor to center stop. The clamping jaws should grab with 1/2" to 1" travel. 7. Reject and replace any automatic splice that does not adequately grip the conductor. 8. Automatic splices are rated for 90% of the conductor strength. Notes : SLACK SPAN TAP (L6) FLYING TAP (L7) LINE CONDUCTOR TYPICAL TOP VIEW Offset 2nd & 3rd phases Wedge Tap Wedge Tap REV 1 - Redrawn in CAD DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of L6, L7 L6 1 1 ELM 1/31/80 400 MIDSPAN TAPS DISTRIBUTION 1 REDRAWN IN CAD 1 1. Limit tap conductor "Maximum Working Tension" (MWT) to 15% of ultimate breaking strength of smallest conductor involved. 2. Minimum of three (3) feet of vertical spacing between phase conductors for two & three phase installations. Notes : 1. Minimum of four (4) feet of between circuits with five (5) foot normal spacing. 2. Jumpers to be slack & same conductor as line conductor. Notes : 2 Conductor, Cu, 1/C, #4, 7-Str, 600V, Red, THWDESCRIPTION 7 2512 LA2 QTY. S/N Arrester, Surge, 9kV, MOV, Riser Pole 1 DESCRIPTION QTY. 1 LA1 58S/N Arrester, Surge, 9kV, MOV, Riser Pole 1 1 58 1 1 2 DATESECTION APP: R CONSTRUCTION STANDARDS DATE:ENGR REVISIONS OPS CAD FILE: PAGE: of LA1,LA2 LA1 1 1 ELM 1/31/80 400 LIGHTNING (SURGE) ARRESTER 1 2/23/00 HWH/JEH MA 2 12/14/09 KJP 3 1/16/19 CM DK Rev 3: Added Hotline Clamps, Wildlife Guard, One-Hole Compression Lugs, and increased amount of #4 red wire. 3 Clamp, Hotline GP 1520, #8 to 2/0 Str, Cu Only 2 283 3 2 3 4 Connector, Compression Lug, #4, Cu/Al, One-Hole, Tin-Plated, For Arreste r2 2548 ITEM NO. ITEM NO. 4 4 Guard, Wildlife, Polymer Arrester 2 1 2583 5 Guard, Wildlife, Polymer Arrester1 2583 2 5 TRAILER PANEL BONDED TO PANEL AND TRAILER CHASSIS GROUND BUS NEUTRAL BUS APPROVED GROUND CLAMP, EXPOSED GROUND #4 CU. MIN. GROUND BUS 200A POLE DISCONNECT CONTINUOUS METER CAN 2" CONDUIT 5'-0" TO 7'-0" 10' NORMAL CHECK STATE CODE 5' MINIMUM 15'-0" MAX LOAD GROUND, INSULATED, GREEN NEUTRAL, INSULATED, WHITE GROUND, BARE MESSENGER, 4-PLEX HOT LEGS INSULATED, BLACK NEUTRAL, INSUL. RAISED RIB ATTACHED W/ 2" U-BOLTS (SUPPORTS) 2" x 6" MIN. WOOD-CONDUIT SAFE WIRING PERMIT WASHINGTON STATE DEPT. OF LABOR & INDUSTRIES EQUAL GROUND ROD 3/4" GALV. PIPE OR LINE NEUTRAL, BARE, TRIP. POWER SOURCE POINT OF ATTACH- MENT FOR SERVING CONDUCTOR. 6" DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of SE10 SE10 1 1 ELM 1/31/80 400 MOBILE HOME TRAILER CONNECTION 1 7/10/81 GGW 2 2/15/10 REDRAWN IN CAD 1. TRAILER SERVICES WILL NOT BE ENERGIZED UNTIL CUSTOMER HAS MADE CONNECTIONS BETWEEN DISCONNECT & TRAILER OR UNLESS PUD INSTALLS SAME. 2. GROUND BUS & NEUTRAL BUS ARE NOT INTERCONNECTED IN TRAILER PANEL. 3. DO NOT DEAD END LINE AND LOAD CONDUCTORS ON SAME BOLT AT SERVICE POLE. 4. CUSTOMER MUST HAVE: (A) GROUND ROD DRIVEN; (B) GROUND WIRE CONNECTED TO GROUND BUS; (C) SUPPORTS ATTACHED TO CONDUITS W/ U-BOLTS BEFORE PUD WILL ATTACH LOOP TO POLE USING 20 PENNY NAILS AND SCREWS SUPPLIED BY CUSTOMER. Notes : 2'-2" 7' 7' 16" DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of SS1 SSD1 1 2 GGW/RWG 6/90 400 ‘ 6 / $ & . 6 3 $ 1 2/0 ACSR MAX WIRE 1 3/02 REDRAWN IN CAD 2 8/25/09 CM AH Rev 2: Updated material & drawing, and changed title 18" 1. A slack span should be kept as short as possible. It should not exceed 100 feet. 2. Call for cutout separately if needed. 3. Call for preformed slack span deadend separately. #2 ACSR - S/N 2241 2/0 ACSR - S/N 2242 NOTES : Field drill DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of SS1 SSD1 2 2 GGW/RWG 6/90 400 ‘ 6 / $ & . 6 3 $ 1 2/0 ACSR MAX WIRE 1 3/02 REDRAWN IN CAD 2 8/25/09 CM AH Rev 2: Updated material & drawing, and changed title Washer, Lock, 5/8" Galv. Clevis, D.E., Insulator 1340 Nut, Square, 5/8" Galv. Insulator, Spool Clevis, Small S/N QTY. 1 1 1 1 1403 923 773 335 S4A Preformed Slack Span Deadend #2 ACSR 1 2241 DESCRIPTION 12 13 9 11 10 4 5 3 1 2 Bracket, Steel, Galv., Multi-purpose, 22" Washer, Sq., Curved, Cast, 3"x 3" x 3/8" Thick x 13/16" Hole Washer, Spring, 5/8" Screw, Lag, 1/2" x 4 1/2" Bolt, Machine, 5/8"x 16" 1 1 1 2217 1132 1392 S/N QTY. 1 1 2262 157 BR1 6 Adapter, Angle Clip 1 2248 DESCRIPTION S4A BR1 4 3 2 1 6 5 9 10 13 11 12 7 Short Shank Insulator Pin (6") 1 2249 8 Porcelain Pin Insulator C-neck 1 771 8 ITEM NO. ITEM NO. 1. Pull conductors hand tight. Excessive slack may cause phase-to-phase contact due to wind. 2. A slack span should be kept as short as possible. It should not exceed 100 feet. 3. The deflection angles of the conductors at the crossarms must not exceed 25 degrees due to the reduced separation. Further reduction may cause phase-to-phase contact under windy conditions. 4. This construction can be used for crossarm framing also. 5. Call for cutouts separately if needed. 6. Call for preformed slack span deadend separately. #2 ACSR -S/N 2241 2/0 ACSR -S/N 2242 NOTES: DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of SS2 SS2 1 2 GGW/RWG 4/92 400 ‘ 6 / $ & . 6 3 $ 1 2/0 ACSR MAX WIRE 1 3/02 REDRAWN IN CAD 2 8/25/09 CM AH Rev 2: Updated material & drawings, and changed title 2' 7' DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of SS2 SS2 2 2 GGW/RWG 4/92 400 ‘ 6 / $ & . 6 3 $ 1 2/0 ACSR MAX WIRE 1 3/02 REDRAWN IN CAD 2 8/25/09 CM AH Rev 2: Updated material & drawings, and changed title Insulator, Pin C Neck Crossarm Pin 16 15 DESCRIPTION 2 2 771 961 QTY. S/N Washer, Lock, 5/8" Galv. Clevis, D.E., Insulator 1340 Nut, Square, 5/8" Galv. Insulator, Spool Clevis, Small S/N QTY. 1 1 1 1 1403 923 773 335 S4A Preformed Slack Span Deadend #2 ACSR 1 2241 DESCRIPTION 13 14 10 12 11 S/N 4 8 6 7 5 1 3 2 Screw, Lag 1/2" x 4 1/2" Washer, Spring, 5/8" Brace, Crossarm 28" Gain, Pole Plastic Washer, Sq. Flat 5/8", 2 1/4" x 2 1/4" DESCRIPTION Bolt, Machine 5/8" x 16" Bolt, Carriage 3/8" x 5" Arm, Cross (Distr.), 3 3/4" x 4 3/4" 1 1 2217 1132 2 205 1 1 1412 709 1 157 1 2 25 78 QTY. CR20A 9 Washer, Curved, Square, Cast, 3" x 3" x 3/8" Thick x 13/16" Hole 1 1392 CR20A S4A 1 9 8 2 4 7 3 5 6 12 13 14 11 10 Washer, Square, Flat 5/8", 2 1/4" x 2 1/4" 17 2 1412 Washer, Spring, 5/8" 18 2 2217 17 15 18 16 ADDITIONAL MATERIAL ITEM NO. ITEM NO. ITEM NO. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of SS3 SS3 1 2 GGW/JCS 5/90 400 ‘ 6 / $ & . 6 3 $ 1 2/0 ACSR MAX WIRE 1 3/02 REDRAWN IN CAD 2 8/25/09 CM AH 3 7/29/10 KJP Rev 3: Changed CR21A to CR20A on material issue. 2' 7' 1. Pull conductors hand tight. Excessive slack may cause phase-to-phase contact due to wind. 2. A slack span should be kept as short as possible. It should not exceed 100 feet. 3. The deflection angles of the conductors at the crossarms must not exceed 25 degrees due to the reduced separation. Further reduction may cause phase-to-phase contact under windy conditions. 4. This construction can be used for crossarm framing also. 5. Call for cutouts separately if needed. 6. Call for preformed slack span deadend separately. #2 ACSR -S/N 2241 2/0 ACSR -S/N 2242 NOTES: DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of SS3 SS3 2 2 GGW/JCS 5/90 400 ‘ 6 / $ & . 6 3 $ 1 2/0 ACSR MAX WIRE 1 3/02 REDRAWN IN CAD 2 8/25/09 CM AH 3 7/29/10 KJP Washer, Square Flat 5/8", 2 1/4" x 2 1/4" Insulator, Pin C Neck Crossarm Pin DESCRIPTION 771 3 3 3 3 2217 961 1412 QTY. S/N 18 15 17 16 Clevis, D.E., Insulator 1340 Nut, Square, 5/8" Galv. Insulator, Spool Clevis, Small S/N QTY. 1 1 1 1 1403 923 773 335 S4A Preformed Slack Span Deadend #2 ACSR 1 2241 DESCRIPTION 13 14 10 12 11 S4A 10 11 14 12 13 17 15 18 16 ADDITIONAL MATERIAL CR20A 1 9 8 2 4 7 3 5 6 S/N 4 8 6 7 5 1 3 2 Screw, Lag 1/2" x 4 1/2" Brace, Crossarm 28" Gain, Pole Plastic Washer, Sq. Flat 5/8", 2 1/4" x 2 1/4" DESCRIPTION Bolt, Machine 5/8" x 16" Bolt, Carriage 3/8" x 5" Arm, Cross (Distr.), 3 3/4" x 4 3/4" 1 1 2217 1132 2 205 1 1 1412 709 1 157 1 2 25 78 QTY. CR20A 9 Washer, Curved, Square, Cast, 3" x 3" x 3/8" Thick x 13/16" Hole 1 1392 SS3 Washer, Lock, Spring, Double Coil, Galv., 5/8" Rev 3: Changed CR21A to CR20A on material issue. Washer, Lock, Spring, Single Coil, Galv., 5/8" Washer, Lock, Spring, Double Coil, Galv., 5/8" ITEM NO. ITEM NO. ITEM NO. CONDUCTOR 2 TURNS 3 3/4 TURNS 2 TURNS 3 1/4 TURNS STARTING POINT TOP GROOVE TIE SIDE GROOVE TIE ELEVATION TOP GROOVE TIE 1. TIE WIRE ASSEMBLY SHOULD BE AS TIGHT AS CAN BE WRAPPED BY HAND, AND ENDS TWISTED WITH PLIERS OR HOT LINE TOOLS. TWIST LEFTHAND ENDS CLOCKWISE, RIGHTHAND COUNTERCLOCKWISE. WITH HOT LINE LOOPS, TIE WIRES MUST BE 8" LONGER THAN SHOWN. 2. TIE WIRES LENGTHS LISTED BELOW CAN BE USED WITH INSULATORS HAVING NECK DIAMETER UP TO AND INCLUDING 3 1 2 ". NOTES: 4 COPPER WIRE 3/0 - 7 STRAND HD COPPER 2/0 - 7 STRAND HD COPPER 1/0 - 7 STRAND HD COPPER 2-3 STRAND COPPER 4A COPPERWELD - COPPER CONDUCTOR .368" .204" .320" .290" DIAMETER CONDUCTOR .414" .464" 8A & 8D COPPERWELD - COPPER 6A COPPERWELD - COPPER 6 COPPER WIRE .219" .230" .162" 6 4 4 4 6 6 SIZE 8 8 8 27" 23" 21" SHORT PIECE LENGTH 27" 23" 21" 27" 23" 21" 40" 35" 30" LONG PIECE LENGTH 40" 35" 30" 40" 35" 30" ANNEALED COPPER TIE WIRE STARTING POINT DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of TI2 TI2 1 1 ELM 1/31/80 400 SINGLE INSULATOR TWO-PIECE TIE COPPER TYPE CONDUCTORS 1 2/15/10 REDRAWN IN CAD CONDUCTOR 4 TURNS STARTING POINT TOP GROOVE TIE SIDE GROOVE TIE 1. TIE WIRE ASSEMBLY SHOULD BE AS TIGHT AS CAN BE WRAPPED AND ENDS TWISTED WITH HOT LINE TOOLS. TWIST LEFTHAND ENDS CLOCKWISE, RIGHTHAND COUNTERCLOCKWISE. 2. TIE WIRES LENGTHS LISTED BELOW CAN BE USED WITH INSULATORS HAVING A NECK DIAMETER UP TO AND INCLUDING 3 1 2 ". NOTES: STARTING POINT 1/2 TURN 4 TURNS 1/2 TURN 6A 2F 2A 3A 4A 5A SIZE 8A 7A .308 .290 .223 DIAM. COND. .366 .258 .199 .326 .230 COPPERWELD COPPER 6 6 6 6 6 6 6 6 34" 33" 32" PIECE FIRST 36" 33" 31" 34" 32" ANNEALED COPPER TIE WIRE AWG SIZE 24" 24" 23" PIECE SECOND 24" 24" 23" 24" 23" 2-SOL 4/0-7W 3/0-7W 2/0-7W 1/0-7W 2-3W SIZE 6-SOL 4-SOL .308 .290 .223 DIAM. COND. .366 .258 .199 .326 .230 COPPER 6 6 6 6 6 6 6 6 38" 36" 32" PIECE FIRST 37" 34" 30" 37" 33" ANNEALED COPPER TIE WIRE AWG SIZE 29" 27" 23" PIECE SECOND 28" 25" 22" 28" 24" DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of TI3 TI3 1 1 400 HOT LINE COPPER TYPE CONDUCTORS 2 TURNS B TOP GROOVE DOUBLE TIE SIDE GROOVE TIE 1. IN MAKING TIES, START WITH MIDDLE OF LENGTH OF TIE WIRE AT POSITION MARKED "B". 2. TO COMPLETE TIE, CINCH UP LAST TWO TURNS AT EACH END WITH PLIARS UNTIL TIE WIRE IS SNUG AND TIGHT. NOTES: 2 TURNS 1 TURN 1 TURN 1 TURN 2 TURNS TIE WIRE 6D "D" TIE WIRE "D" 6D 6D 1 TURN 3 TURNS 2 TURNS 1 TURN 1 TURN 2 TURNS B 4/0 3/0 2/0 SIZE .563 INCHES DIAM. .502 .477 A.C.S.R. 4 4 4 SIZE 9'-3" FEET LENGTH 8'-9" 8'-3" ALUMINUM TIE WIRE 1/0 2 4 SIZE .398 INCHES DIAM. .325 .257 A.C.S.R. 6 6 6 SIZE 8'-3" FEET LENGTH 7'-5" 7'-3" ALUMINUM ALLOY TIE WIRE DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of TI4 TI4 1 1 400 SINGLE INSULATOR ALUMINUM ALLOY, ACSR CONDUCTOR, STRAIGHT OR PREFORMED ARMOR RODS B TOP GROOVE DOUBLE TIE SIDE GROOVE TIE 1. IN MAKING TIES, START WITH MIDDLE OF LENGTH OF TIE WIRE AT POSITION MARKED "B". 2. TO COMPLETE TIE, CINCH UP LAST TWO TURNS AT EACH END WITH PLIARS UNTIL TIE WIRE IS SNUG AND TIGHT. 3. USE THE FLAT FACE OF THE PLIERS AGAINST THE AMOR RODS. NOTES: TIE WIRE 6D "D" TIE WIRE "D" 6D B 4/0 3/0 2/0 SIZE .563 INCHES DIAM. .502 .477 A.C.S.R. 4 4 4 SIZE 9'-3" FEET LENGTH 8'-9" 8'-3" ALUMINUM TIE WIRE 1/0 2 4 SIZE .398 INCHES DIAM. .325 .257 A.C.S.R. 6 6 6 SIZE 8'-3" FEET LENGTH 7'-5" 7'-3" ALUMINUM ALLOY TIE WIRE 6D 6D B 2 TURNS 2 TURNS 1 TURN 1 TURN 1 TURN 2 TURNS B 1 TURN 3 TURNS 2 TURNS 1 TURN 1 TURN 2 TURNS DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of TI5 TI5 1 1 400 DOUBLE INSULATOR ALUMINUM ALLOY, ACSR CONDUCTOR, STRAIGHT OR PREFORMED ARMOR RODS | 01/17/19 |
| Section 410 - Overhead Secondary | 03/15/23 |
| Section 500 - Crossarms & Poles | 02/04/26 |
| Section 600 - Grounding | 12/26/22 |
| Section 700 - Guys & Anchors | 02/11/25 |
| Section 800 - Line Devices | 02/11/25 |
| Section 900 - MeteringN New Standard R Redrawn Standard C Changed Standard ~ No Change 900 M ETER ING 11/19/2020 ~ M Metering Requirements - General, Commercial & Residential ~ M1 Primary Metering Insta llation - OH to UG - 7.2 kV , Wye – 3 - Ele ment Meter ~ M1A Primary Metering Installation - OH - 7.2kV, Wye - 3 - Element Meter ~ M4 Primary Metering Installation - OH to UG - 7.2kV, 1 Ø , 1 - Element Meter ~ M4A Primary Metering Installation - OH - 7.2kV, 1 Ø , 1 - Element Meter ~ M7 Underground Primary Metering Pad – 1 Ø - 200 Amp C M8 Underground Primary Metering Pad – 3 Ø - 200 and 600 Amp ~ M16 Secondary Metering Installation - Pole Mounted - 3 Ø , 4 - Wire ~ M17 Secondary Metering Installation - Pole Mounted - 1 Ø , 3 - Wire ~ M20 Pad & Assembly - Secon dary Me tering for Padmount Transformer ~ M23 D/I CT Metering at Padmount Transformer ~ M28 Recommended Layout for Temporary Electric Service - 120/240v – 3 - Wire ~ M28A Recommended Conductor Supports for Temporary Electric Service ~ MBCT CT Meter Base Support for Padmount Transformer ~ UM1 Primary 3 Ø Metering Enclosure ~ UMS4 - 36 Secondary 1Ø CT Metering Assemblies Residential DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M M 1 4 JEH 2/22/00 900 METERING REQUIREMENTS GENERAL 0 8/20/02 1 8/2/05 LB AH 2 1/13/10 CM AH CLARK PUBLIC UTILITY METERING REQUIREMENTS BASED ON EUSERC SPECIFICATIONS TYPE OF SERVICE OR SOURCE VOLTAGES SINGLE PHASE 120/240 VOLTS NETWORK 120/208V (2 LEGS OF Y) 4 WIRE WYE 120/208 VOLTS 4 WIRE DELTA 240/120 VOLTS : , 5 ( ‘ ' ( / 7 $ 9 (Existing service only. New services, current trans. Will be 4 wire 240/120) : , 5 ( ‘ ' ( / 7 $ 9 (Existing service only. New services, current trans. Will be 4 wire 240/480 : , 5 ( ‘ 277/480 VOLTS SIZE TERMINALS NUMBER OF PROVISION BYPASS SWITCH TEST METERING REACTIVE 200 amp 320 amp C.T. 200 amp C.T. 200 amp C.T. 200 amp C.T. 200 amp C.T. 200 amp 200 amp C.T. & V.T. Prim. Met. B/base 7200/120 P.T. & C.T. (Contact district about type of socket and whether or not current transformers and reactive metering will be required before making any 480 volt installations) 4 4 6 5 8 7 13 7 13 5 8 5 7 13 13 C.T. - Current Transformer V.T. - Voltage Transformer BLOCK BYPASS NO NO NO NO NO NO NO NO YES NO YES NO NO NO NO NO NO YES YES YES YES YES NO NO NO NO NO NO NO NO NO NO BLOCK BYPASS Commercial Residential Commercial Residential 200 amp 4 NO NO NO C.T. 6 NO NO NO Commercial Residential 200 amp 5 NO NO NO Commercial (Swimming pools over 35kw will be C.T.'d or 320 amp) Rev 2 - Changed blocks marked with a *. SAFETY SOCKET SAFETY SOCKET SAFETY SOCKET SAFETY SOCKET SAFETY SOCKET * SAFETY SOCKET DEMAND METERING 20KW OR GREATER NO COMMERCIAL ONLY 20KW OR GREATER NO NO NO NO YES YES YES YES YES YES YES YES YES YES YES * YES * YES * YES * YES * 120V 120V 208V A 120/208V 1 PHASE NETWORK 120V 2 WIRE 120V N B C B A 3 PHASE 3 WIRE 240V 240V 240V SINGLE PHASE 3 WIRE 120/240V 240V 120V 120V A N B A N 3 PHASE 4 WIRE WYE 120/208V (or 277/480V) 3 WIRE SERVICE USING ONE C.T. 6 TERMINAL SOCKET 3 WIRE SINGLE SERVICE USING 2 C.T.'s 6 TERMINAL SOCKET 3 PHASE 4 WIRE DELTA 240/120V A N A B N A B C A C B N A B C N A B N A B C N 240V 240V 208V 208V NEUTRAL WHITE POWER LEG POWER LEG NEUTRAL WHITE 120V 208V 120V 120V A B N C NEUTRAL WHITE LEGEND CURRENT COIL VOLTAGE COIL C.T. RATED SELF CONTAINED ALL METER SOCKETS TO BE GROUNDED DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M M 2 4 JEH 2/22/00 900 METERING REQUIREMENTS GENERAL 0 REDRAWN IN CAD 0 8/20/02 1 8/2/05 LB AH SEE MD04 * SEE MD06 * SEE MD08 * SEE MD09 * SEE MD01 * SEE MD02 * SEE MD07 * SEE MD11 * MD11A * REV. 1 - Added Metering Diagram Numbers. POSITION OPTIONS POSITION OPTIONS DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M M 3 4 JEH 2/22/00 900 METERING REQUIREMENTS COMMERCIAL APPLICATION 1 8/2/05 LB AH 2 12/19/07 LB AH 3 1/13/10 CM AH 4 6/18/10 KJP DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M M 4 4 JEH 2/22/00 900 METERING REQUIREMENTS RESIDENTIAL 0 REDRAWN IN CAD 0 8/20/02 1 8/2/05 LB AH 2 12/19/07 LB AH UG CT CT CT VT C/0's L.A. SOURCE VT VT 6 3 2 1 5 12 4 3 13 10 11 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M1 M1 1 2 ELM 1/31/80 900 PRIMARY METERING INSTALLATION OVERHEAD TO UNDERGROUND 7.2KV, WYE - 3 ELEMENT METER 1 3/02 Redrawn In Cad 2 8/11/10 CM AH Rev 2: Changed to single-bushing PTs and updated drawing & material list. 8 6" 6" Note : Meter shop will pre-wire the rack with #4 SD for the grounds and leave a 10' coil for line crew to connect to system neutral, and red-covered # 2Cu 7-str with 10' coil left on source-side and 2-bolt spade on load side. 7 9 9 Bolt, Machine 5/8" x 12" Galv 8 2 155 Cond, Wire, Cu 1/C #2AWG 7Str 600V Red 9 2513 60 MM1 from Meter Dept., CT/VT Assembly w/ Rack 12 11 10 N/S 1 2 2 2217 1392 DESCRIPTION 4 7 6 5 1 3 2 Washer, Curved, Square, Cast, 3" x 3" x 3/8" thick x 13/16" hole DESCRIPTION Bolt, Double, Arm, 5/8" x 16" Wire, Tie, AL Annealed #4 SD Insulation Pin C Neck Pin Adapter 81 1 3012 10 2 1 1403 2217 1968 1 2 1 1392 959 QTY. S/N PR20TREE DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M1 M1 2 2 ELM 1/31/80 900 PRIMARY METERING INSTALLATION OVERHEAD TO UNDERGROUND 7.2KV, WYE - 3 ELEMENT METER 1 3/02 Redrawn In Cad 2 8/11/10 CM AH QTY. S/N ADDITIONAL MATERIAL Rev 2: Changed to single-bushing PTs and updated drawing & material list. Washer, Curved, Square, Cast, 3" x 3" x 3/8" thick x 13/16" hole Connector, Compression Lug, #2 Cu 13 427 3 Washer, Lock, Spring, Double Coil, Galv., 5/8" Washer, Lock, Spring, Single Coil, Galv., 5/8" Washer, Lock, Spring, Double Coil, Galv., 5/8" ITEM NO. ITEM NO. CT CT VT C/0's SOURCE VT VT LOAD 3 12 9 1 2 6 4 5 8 10 11 CT DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M1A M1A 1 2 ELM 1/31/80 900 PRIMARY METERING INSTALLATION OVERHEAD CONSTRUCTION 7.2KV, WYE - 3 ELEMENT METER 1 3/02 Redrawn In Cad 2 8/11/10 CM AH Rev 2: Changed to single-bushing PTs, removed arresters, and updated drawing & material list. 7 Note : Meter shop will pre-wire the rack with #4 SD for the grounds and leave a 10' coil for line crew to connect to system neutral, and red-covered #2 Cu 7-str with 10' coil left on source-side and 2-bolt spade on load side. 13 Bolt, Machine 5/8" x 12" Galv 8 2 155 Cond, Wire, Cu 1/C #2AWG 7Str 600V Red 10 9 2513 60 MM1A from Meter Dept., CT/VT Assembly w/ Rack Washer, Curved, Square, Cast, 3" x 3" x 3/8" thick x 13/16" hole 12 11 N/S 1 2 2 2217 1392 DESCRIPTION 4 7 6 5 1 3 2 Washer, Curved, Square, Cast, 3" x 3" x 3/8" thick x 13/16" hole DESCRIPTION Bolt, Double Arm, 5/8" x 16" Wire, Tie, AL Annealed #4 SD Insulation Pin C Neck Pin, Adapter 81 1 3012 10 2 1 1403 2217 1968 1 2 1 1392 959 QTY. S/N PR20TREE Additional Material QTY. S/N DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M1A M1A 2 2 ELM 1/31/80 900 PRIMARY METERING INSTALLATION OVERHEAD CONSTRUCTION 7.2KV, WYE - 3 ELEMENT METER 1 3/02 Redrawn In Cad 2 8/11/10 CM AH Rev 2: Changed to single-bushing PTs, removed arresters, and updated drawing & material list. Connector, Compression Lug, #2 Cu 13 3 427 Washer, Lock, Spring, Double Coil, Galv., 5/8" Washer, Lock, Spring, Single Coil, Galv., 5/8" Washer, Lock, Spring, Double Coil, Galv., 5/8" ITEM NO. ITEM NO. UG CT C/0 L.A. SOURCE VT 1 4 3 2 5 6 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M4 M4 1 2 ELM 1/31/80 900 PRIMARY METERING INSTALLATION OVERHEAD TO UNDERGROUND 7.2KV, 1 PHASE, 1 ELEMENT METER 1 3/02 Redrawn In Cad 2 8/11/10 CM AH Rev 2: Changed to single-bushing PTs and drawing & material corrections. Note : Meter shop will pre-wire the rack with #4 SD for the grounds and leave a 10' coil for line crew to connect to system neutral, and red-covered #2 Cu 7-str with 10' coil left on source-side and 2-bolt spade on load side. 11 10 9 13 7 12 8 4 3 Bolt, Machine 5/8" x 12" Galv 2 155 Cond, Wire, Cu 1/C #2 7Str 600V Red 1 5 6 2513 20 MM1 from Meter Dept., CT/VT Assembly w/ Rack Washer, Curved, Square, Cast, 3" x 3" x 3/8" thick x 13/16" hole N/S 1 2 2 2217 1392 DESCRIPTION 427 1 Connector, Compression Lug, #2 Cu 2 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M4 M4 2 2 ELM 1/31/80 900 PRIMARY METERING INSTALLATION OVERHEAD TO UNDERGROUND 7.2KV, 1 PHASE, 1 ELEMENT METER 1 3/02 Redrawn In Cad 2 8/11/10 CM AH S/N QTY. Rev 2: Changed to single-bushing PTs and drawing & material corrections. 10 13 12 11 7 9 8 Washer, Curved, Square, Cast, 3" x 3" x 3/8" thick x 13/16" hole DESCRIPTION Bolt, Double, Arm, 5/8" x 16" Wire, Tie, AL Annealed #4 SD Insulation Pin C Neck Pin Adapter 81 1 3012 10 2 1 1403 2217 1968 1 2 1 1392 959 QTY. S/N PR20TREE ADDITIONAL MATERIAL Washer, Lock, Spring, Double Coil, Galv., 5/8" Washer, Lock, Spring, Double Coil, Galv., 5/8" Washer, Lock, Spring, Single Coil, Galv., 5/8" ITEM NO. ITEM NO. SOURCE CT C/0 VT 3 4 5 2 6 1 12 9 10 8 11 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M4A M4A 1 2 ELM 1/31/80 900 PRIMARY METERING INSTALLATION OVERHEAD CONSTRUCTION 7.2KV, 1 PHASE, 1 ELEMENT METER 1 3/02 Redrawn In Cad 2 8/11/10 CM AH Rev 2: Changed to single-bushing PTs, removed lightning arrester and drawing & material corrections. 7 Note : Meter shop will pre-wire the rack with #4 SD for the grounds and leave a 10' coil for line crew to connect to system neutral, and red-covered #2 Cu 7-str with 10' coil left on source-side and 2-bolt spade on load side. 13 Washer, Curved, Square, Cast, 3" x 3" x 3/8" thick x 13/16" hole Pin, Adapter Wire, Tie, AL Annealed #4 SD Bolt, Double Arm, 5/8" x 16" 7 4 6 5 3 2 Insulation Pin C Neck 1 10 3012 1 1 2 1 2 81 2217 1403 959 1392 DESCRIPTION QTY. 1 S/N 1968 PR20TREE Cond, Wire, Cu 1/C #2AWG 7Str 600V Red MM1A from Meter Dept., CT/VT Assembly w/ Rack Bolt, Machine 5/8" x 12" Galv 11 12 9 10 8 DESCRIPTION 1 2 2217 N/S 20 2 2 2513 1392 155 QTY. S/N DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M4A M4A 2 2 ELM 1/31/80 900 PRIMARY METERING INSTALLATION OVERHEAD CONSTRUCTION 7.2KV, 1 PHASE, 1 ELEMENT METER 1 3/02 Redrawn In Cad 2 8/11/10 CM AH Washer, Curved, Square, Cast, 3" x 3" x 3/8" thick x 13/16" hole Rev 2: Changed to single-bushing PTs, removed lightning arrester and drawing & material corrections. Additional Material Connector, Compression Lug, #2 Cu 13 1 427 Washer, Lock, Spring, Double Coil, Galv., 5/8" Washer, Lock, Spring, Single Coil, Galv., 5/8" Washer, Lock, Spring, Double Coil, Galv., 5/8" ITEM NO. ITEM NO. 1. ALL CONCRETE SHALL BE 2500 PSI AND HAVE A SLUMP OF 4" TO 6". 2. REINFORCING SHALL CONFORM TO ASTM DESIGNATION A15 AND A305. 3. TROWEL SMOOTH SURFACES AND BRUSH FINISH. ROUND ALL EDGES. PLAN SECTION "A-A" & 2 1 & 5 ( 7 ( 3 $ ' ' ( 7 $ , / 6 ) 2 5 ‘ $ 0 3 UNDERGROUND PRIMARY METERING ENCLOSURE GENERAL NOTES: DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M7 M7 1 1 ELM 1/31/80 900 UNDERGROUND PRIMARY METERING PAD SINGLE PHASE 200 AMP 1 3/02 REDRAWN IN CAD 2 7/15/02 JEH TR 3 8/2/05 LB AH 4 12/19/07 LB AH 5 H Y 1 H Z S D G G L P H Q V L R Q V I R U D P S ‘ X Q G H U J U R X Q G P H W H U L Q J H Q F O R V X U H 1. UTILITY VAULT PAD #4872SLB6-1430CLARK 6'-0" 4'-0" 1'-6" 1'-10" 1'-6" 1'-3" 9" L C 6" 1 1 2 " CLR. 3 4 " CLR. 14" x 30" BLOCKOUT (2)-1'-6" LONG GALV. C-CHANNEL (W-7370) (2)-9" LONG GALV. C-CHANNEL (W-7370) 1'-2" 1'-3" 9" 1'-3" 1'-2" 7" 2" 5" 6" 3" 3" B B A A (4)-2 TON FLAT FOOT 7" 7" L C 1'-6" 1'-6" L C 1'-2" 1'-10" 3" 3" SECTION "B-B" WT. VOL. CONCRETE: 2 #6 GR. 60 2 6'-9"x STR. 20 2A #6 GR. 60 5 4'-11"x STR. 37 LIFT ANCHOR 4 2 TON SPREAD 1 #6 GR. 60 9 6'-9"x STR. 91 3 #4 GR. 60 2 6'-9"x STR. TOP 9 4 #4 GR. 60 2 6'-9"x STR. TOP 9 C-CHANNEL(W-7370) 2 8" LONG C-CHANNEL(W-7370) 2 1'-6" LONG PART QTY. DESCRIPTION SIZE WT. LBS. TOTAL BILL OF MATERIAL = WEIGHT = VOLUME GENERAL NOTES: DATESECTION APP: R CONSTRUCTION STANDARDS DATE:ENGR REVISIONS OPS CAD FILE: PAGE: of M8 M8 1 1 LB/AH 12/19/07 900 UNDERGROUND PRIMARY METERING PAD THREE PHASE 200 AND 600 AMP 1 6/18/10 KJP 2 12/21/14 KJP 3 11/19/20 CM GM Rev 3: Changed to lighter (2130 vs 4769 lb) and smaller pad TOP VIEW 14"x68" BLOCKOUT 1. All concrete shall be 2500 PSI and have a slump of 4" to 6". 2. Reinforcing shall conform to ASTM designation A15 and A305. 3. Trowel smooth surfaces and brush finish. Round all edges. 1. Pad = 2,130 lb 2. Oldcastle pad #6084SLB6-1468-Clark. 3. Use template for conduit placement. FRONT VIEW Pad, Primary Metering Module, Concrete, 5' x 7' w/ 14" x 68" Blockout ITEM NO. 1 M8 QTY 1 2332 S/N DESCRIPTION 6" 5'-0" 4 7 6 5 1 3 2 DESCRIPTION Strap, Pipe 1" HW Conduit, Schedule 80 PVC 1" x 10' Meter base, Superior, w/ channel 1 1/2" x 1 1/2", from Meter Dept. LB, from Meter Dept. Strap, Pipe 3" HW 1239 2 MM1 20 376 2482 MM1 1 2 1 1243 MM1 QTY. S/N M16 Transformer, current, from Meter Dept. Connector, crimpet Cu 4/4 - 6/6 Weatherhead 1", from Meter Dept. Conductor, BSDC 4SLD 1C 8 9 1 452 MM1 1 3 10 SECTION AA A A 7 4 9 3 8 2 3 1 6 SOURCE Neutral white Drip loop Existing U8 (U3-2 brackets) 13 point w/ Test Switch Existing U8 6" 2" 6'-0" Adjust to local conditions 8'-0" Existing U8 R2 - Minor drawing changes DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M16 M16 1 1 ELM 1/31/80 900 SECONDARY METERING INSTALLATION POLE MOUNTED - 3 PHASE, 4 WIRE 1 1 3/02 Redrawn In Cad 2 7/15/02 JEH TR ITEM NO. 4 7 6 5 1 3 2 DESCRIPTION Conduit band from Meter Dept. Conduit, Schedule 80 PVC 3/4" x 10' Meter base w/ channel 3/4" x 1 1/2" from Meter Dept. Strap, Pipe 3" HW MM1 2 MM1 20 376 2221 MM1 1 2 1243 QTY. S/N M17 Transformer, current, from Meter Dept. Connector, crimpet, Cu 4/4 - 6/6 Weatherhead 3/4", from Meter Dept. Conductor, BSDC 4SLD 1C 8 1 452 MM1 1 2 10 SECTION AA A A 6 4 8 2 7 2 1 5 SOURCE Drip loop Existing U8 (U3-2 brackets) 6 point Existing U8 6" 2" 6'-0" Adjust to local conditions 8'-0" Existing U8 3 Neutral R2 - Minor drawing changes DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M17 M17 1 1 ELM 1/31/80 900 SECONDARY METERING INSTALLATION POLE MOUNTED - 1 PHASE, 3 WIRE 1 1 3/02 Redrawn In Cad 2 7/15/02 JEH TR ITEM NO. 2'-6" 15" 6" FRONT OF PAD 12" 6" 6" 21" Notes: CIRCLE AW 121413 OR EQUIVALENT. METER BASE, 13 POINT, W/SPACE CT's WILL BE FURNISHED BY CPU. CUSTOMER WILL INSTALL ASSEMBLY WHEN TRANSFORMER & PAD ARE INSTALLED. CUSTOMER TO POUR CONCRETE FOOTING FOR METER. MAY BE REDUCED TO 4' PROVIDED NOT LESS THAN FLUSH WITH TOP OF TRANSFORMER. 1. 2. 3. 4. 5. CENTER OF SECONDARY COMPARTMENT THIS INSTALLATION SHALL BE USED ONLY WHEN IT IS IMPRACTICAL TO INSTALL THE METER ON THE BUILDING AND ONLY AFTER DISTRICT APPROVAL. 6. 24" MIN 18" NOMINAL PLAN VIEW ‘ 7 5 $ 1 6 ) 2 5 0 ( 5 CT's MOUNTED IN SECONDARY COMPARTMENT 4" MAX 18" MIN 12" 5'-10" NORMAL (SEE NOTE 7) CONCRETE FOOTING APRX 12"x12"x18" (2 - 90# BAGS OF CONCRETE MIX) TRANSFORMER PAD & METER FOOTING FOR TEST SWITCH. BASE MTR 1. REMOVED CT CAN 4 7 6 5 1 3 2 Conduit 1" Rigid or Sch. 80 PVC DESCRIPTION Meter Base W/ Test Block - See Note 1 Bushing Conduit Grounding Ground Wire #6 Cu Channel Support 3" x 8" x 3/8", 5'6" Locknut 1" ( O O ƒ & R Q G 5 L J L G R U 6 F K 3 9 & --- 1 --- 4 1 Ft. --- --- --- 3 Ft. 2 --- --- QTY. S/N M20 2. NOTES WITH STAR HAVE BEEN REVISED 6 4 6 3 3 3 2 7 2 5 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M20 M20 1 1 1/31/80 900 PAD & ASSEMBLY SECONDARY METERING FOR PADMOUNT TRANSFORMER 1 1 2/22/00 HWH MA 2 8/1/00 ITEM NO. 25 KVA 1 9 5 6 7 3 2 4 8 5 10 11 7 6 43" 1 1 1 2 1 1 * M.D.S. MEANS METER DEPARTMENT STOCK ADAPTER, PVC, MALE, 3/4" BUSHING, INSULATED, 3/4" M.D.S. * 2027 M.D.S. * LOCKNUT, 3/4" CT METER BASE SUPPORT DRAWING MBCT MACHINE BOLT 5/8" X 1" WASHER, FLAT, ROUND, GALV, 5/8" CONDUIT, PVC, SCH. 40, 3/4" M.D.S. * 138 1395 1564 10' 1 CONDULET, L.B., 3/4" METER BASE, 6, TERMINAL 1 REDUCER, 3/4" X 2" M.D.S. * M.D.S. * M.D.S. * 1 NIPPLE, 3/4", CLOSE M.D.S. * 2 7 6 5 4 3 1 DESCRIPTION M23 QTY. S/N 11 10 9 8 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M23 M23 1 1 4/92 900 DISTRICT INSTALLED CT METERING AT PADMOUNT TRANSFORMER 1 1 2/23/00 HWH MA ITEM NO. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M28 M28 1 1 1965 900 LAYOUT FOR TEMPORARY ELECTRICAL SERVICE 120/240V - 3 WIRE 1 Redrawn In Cad 1 3/02 PUD POLE, PADMOUNT TRANSFORMER OR UNDERGROUND PEDESTAL TRIPOD CONDUCTOR SUPPORT ( SEE DETAIL & NOTE ) 14' MINIMUM HEIGHT FOR VEE OF TRIPOD PUD INSTALLED TEMPORARY SERVICE OR CUSTOMER INSTALLED TEMPORARY SERVICE (SEE SPEC. M28) MAXIMUM FOR STRAIGHT LINE MAX. FROM CORNER 100' 100' 75' 75' 100' IF SERVICE CROSSES A ROADWAY, USE 24' x 2" x 6" FIR BOARDS FOR TRIPODS & PLACE ADJACENT TO ROADWAY TO REDUCE CONDUCTOR SPAN & PROVIDE MINIMUM OF 18' CLEARANCE (CHECK WITH PUD ENGINEER IF SERVICE ROUTE CROSSES STATE HIGHWAY). Note: TOPS TO BE EXTENDED 1' ABOVE NAILED OR BOLTED INTERSECTION 3 - 16' x 2" x 4" FIR BOARDS 7' BETWEEN STAKES 2" x 4" STAKE (MIN. 18" IN GROUND) TRIPOD DETAIL TO BE USED ONLY WITH DISTRICT APPROVAL DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of M28A M28A 1 1 8/76 900 CONDUCTOR SUPPORTS FOR TEMPORARY ELECTRIC SERVICE 1 Redrawn In Cad 1 3/02 2" 1-1/4" 0.5" 1" 25" 1" 6" 0.75" 1 3 2 4 5 2" C L 2" 1" 5/16" HOLE 9/16" DRAIN HOLE 5/16" HOLE 5" 9" 7" 8" NOTE: HOT DIP GALVANIZE AFTER FABRICATION 3 4 2 Tube, 1/8" Square, 1 1/2" x 36" Angle Steel, 1/8" Thick, 2" x 2" x 8" 1 DESCRIPTION Plate, Steel Base, 4" x 6" x 1/8" - - - -- -- -- MBCT QTY. - S/N -- 5 - -- Plate, Steel Spacer, 1" x 2" x 1/8" Plate, Steel, 8" x 9" x 1/8" DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of MBCT MBCT 1 1 4/22 900 CT METER BASE SUPPORT FOR PADMOUNT TRANSFORMER 1 1 2/23/00 HWH MA ITEM NO. 2 3 ELEVATION FRONT VIEW A B C S L S L S L ALL NEUTRAL EXTENSIONS SHALL BE #2 B.C. 5 3 4 2 1 DESCRIPTION Clamp, Ground Rod 5/8" x 8' Clamp, Ground Rod 5/8" SML Terminator, Elbow L.B. 200A 1 1 1124 281 QTY. 6 S/N 1312 UM1 Conductor, Copper, #2 Sol. BCSD 40 1553 1 4 5 REV 2: CHANGED TO CURRENT-RESET FAULT INDICATORS & ADDED NOTES INDICATOR FAULT F LINAM INDICATOR F LINAM FAULT INDICATOR F LINAM FAULT DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of UM1 UM1 1 1 9/94 900 PRIMARY 3 PHASE METERING ENCLOSURE 1 1 2/23/00 HWH MA 2 8/2/05 LB AH NOTE: PRIMARY METER ENCLOSURE IS NOT A STOCK ITEM. FOR A REPLACEMENT FOR CPU MAINTENANCE, A "PURCHASE REQUISITION" MUST BE GENERATED BY THE ENGINEER FOR PURCHASING. PURCHASING WILL GENERATE THE "PURCHASE ORDER." A COPY OF THE SPECIFICATION FOR THE ENCLOSURE IS IN THE METERING MANUAL. Fault Indicator 3 2581 3" MIN. ITEM NO. CT CT NEUTRAL SEE DETAIL ON SHEET 2 C.T. CAN FRONT VIEW NOTE: FOR CONDUCTORS 1/0 TO 350 KCM ALUMINUM 5 ( 9 5 ( 0 2 9 ( ' ‘ ) 5 2 0 7 , 7 / ( $ 1 ' & 2 5 5 ( & 7 ( ' 1 2 7 ( 0 $ 7 ( 5 , $ / , 6 6 8 ( DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of UMS4,UMS6,UMS34,UMS36 UMS4 1 2 9/94 900 6 ( & 2 1 ' $ 5 < ‘ CT METERING ASSEMBLIES RESIDENTIAL 1 1 2/23/00 HWH MA 2 8/2/05 LB AH REV 1. NOTES FOLLOWED BY STAR HAVE BEEN REVISED UMS 6 UMS 4 UMS 36 UMS 34 MAX. NO. OF SECONDARY TRIPLEX CONDUCTORS 4 2 1 1 2 CONDUCTORS 4 MAX. NO. OF SECONDARY QUADRUPLEX 1 2 MAX. NO. OF SECONDARY TRIPLEX CONDUCTORS 6 MAX. NO. OF SECONDARY QUADRUPLEX CONDUCTORS 6 2 1 LOAD 3 SOURCE LOAD 1 LOAD 2 SOURCE LOAD 3 LOAD 2 LOAD 1 SOURCE LOAD 3 LOAD 2 LOAD 1 SOURCE LOAD 3 LOAD 2 LOAD 1 DESCRIPTION Connector, Pedestal 6 Cover, Connector 2 1 4 4 531 574 QTY. S/N UMS36 Cover, Connector Connector, Pedestal 4 2 1 DESCRIPTION UMS34 4 QTY. 4 573 S/N 528 Connector, Pedestal 6 2 1 DESCRIPTION UMS6 3 3 QTY. 574 531 S/N Cover, Connector Cover, Connector Connector, Pedestal 4 1 2 DESCRIPTION UMS4 QTY. 3 3 S/N 528 573 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of UMS4,UMS6,UMS34,UMS36 UMS4 2 2 9/94 900 6 ( & 2 1 ' $ 5 < ‘ CT METERING ASSEMBLIES RESIDENTIAL 1 1 2/23/00 HWH MA 2 8/2/05 LB AH 5 ( 9 5 ( 0 2 9 ( ' ‘ ) 5 2 0 7 , 7 / ( $ 1 ' & 2 5 5 ( & 7 ( ' 1 2 7 ( 0 $ 7 ( 5 , $ / , 6 6 8 ( ITEM NO. ITEM NO. ITEM NO. ITEM NO. | 11/19/20 |
| Section 1000 - Streetlighting | 02/10/25 |
| Section 1100 - Overhead Transformers | 03/15/23 |
| Section 1150 - ClearancesN New Standard R Redrawn Standard C Changed Standard ~ No Change 1150 C LEARANCES 11/28/2016 ~ CFG Construction Framing Guide N COR OH Clearance to Roadways & Other Surfaces - NESC Minimum ~ CTS OH Clearance to Structures N DC OH Clearance to Roadways & Other Surfaces - Design Minimum C UPTC Padmount Transformer Clearances DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of CFG CFG 1 6 CM/AH 10/17/08 1150 CONSTRUCTION FRAMING GUIDE TRANSMISSION UNDERBUILD 18" 3'-0" 7'-0" 24" 6" 6" Guy position when needed Guy position when needed 6" Guy position when needed *10'-0" Minimum 64" 41.3" 105.3" * For tall poles, make sure the distribution can be reached by a service/line truck. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of CFG CFG 2 6 CM/AH 10/17/08 1150 CONSTRUCTION FRAMING GUIDE INTERSECTION 4'-0" 7'-0" 3'-8" 18" 6" 3'-8" 4" 6" 4" Guy position when needed DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of CFG CFG 3 6 CM/AH 10/17/08 1150 CONSTRUCTION FRAMING GUIDE ‘ ) 8 6 ( ' 7 $ 3 6" 4" 4" 8" 8" Guy position when needed Guy position when needed 6" 6" Alternate I R U ‘ 7'-0" 7'-0" DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of CFG CFG 4 6 CM/AH 10/17/08 1150 CONSTRUCTION FRAMING GUIDE BUCKARM 7'-0" 18" 6" 2'-6" 11'-0" DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of CFG CFG 5 6 CM/AH 10/17/08 1150 CONSTRUCTION FRAMING GUIDE 8 1 ) 8 6 ( ' ‘ 7 $ 3 7'-0" 2'-0" 6" 7'-0" Guy position when needed Alternate I R U ‘ 6" DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of CFG CFG 6 6 CM/AH 10/17/08 1150 CONSTRUCTION FRAMING GUIDE TWIGGY TO TAP ON CROSSARM 7'-0" 1'-0" 3'-0" 2'-0" 6" Guy position when needed Communications Washington State Highways DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COR COR 1 2 CM/DK 11/10/16 1150 OVERHEAD CLEARANCE TO ROADWAYS & OTHER SURFACES NESC MINIMUM Along or crossing roads/streets, alleys, driveways, and parking lots (not state highways) Spaces and ways subject to pedestrians or restricted traffic only Top of rails for railroads (except electrified trolleys) -See page 2 for Burlington Northern Joint Usage Comm. 0-750 V 751-15,000 V 15,001-50,000 V 50,001 V And Over Type of Utility Line Lines Crossing Highway Lines Parallel To Highway 24' 20' 24' 30' 32' 34' 20' 20' 24' 27' 32' 32' 2017 NESC Minimum Vertical Clearances 115 kV 69 kV 12.47 kV Noninsulated Secondary Insulated Secondary & Non-Insulated Communications Effectively Grounded Neutral & Insulated Communications Ground 20'-6" 19'-6" 18'-6" 16'-6" 16'-0" 15'-6" 16'-6" 15'-6" 14'-6" 12'-6" 12'-0" 9'-6" 28'-6" 27'-6" 26'-6" 24'-6" 24'-0" 23'-6" 1. These minimum clearances must be met at maximum final sag. 2. See tables that follow for other surfaces and span guys. 3. Clearances per WAC 468-34-290 and NESC C2-2017 Rule 232. 4. See Std DC - Design Clearances - Section 1150 for new construction. Notes : DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COR COR 2 2 CM/DK 11/10/16 1150 OVERHEAD CLEARANCE TO ROADWAYS & OTHER SURFACES NESC MINIMUM Neutrals, grounded guys, ungrounded guys exposed to 0 to 300V Services (0 to 750V multiplex), (does not include building being served) Ungrounded guys exposed to 750V to 22kV Primary (7.2/12.5kV) 69kV 115kV Table 2 - Horizontal clearances to signs, chimneys, billboards, radio and TV antennas, and tanks readily accessible to pedestrians. Unguarded rigid live parts & equipment cases (0 to 750V), ungrounded guys (300 to 750V) NESC Minimum Horizontal Clearance (feet) Rev. 2 - Updated for 2017 NESC and corrected labels on tables. NESC Minimum Horizontal Clearance (feet) Conductor Conductor DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of CTS CTS 1 5 LB/AH 3/17/04 1150 OVERHEAD CLEARANCE TO STRUCTURES 1 10/17/08 CM AH 2 9/5/16 KJP 1. The preferred design clearance to structures is 10 feet, if possible, in recognition of WAC 296-24-960 Unqualified Worker minimum clearance of 10 feet to any conductors (including the neutral) up to 50kV. There will be installations where it is not possible to obtain 10 feet of clearance. In those cases the 2017 NESC Rule 234 minimum clearances shall be met. 2. The clearances in these tables are the absolute minimums required by code. The values are based on worst-case conductor loading, conductor tension, and wind loading. 3. Ungrounded guys and ungrounded portions of guys between guy insulators shall have clearances based on the highest voltage to which they may be exposed to a slack conductor or guy. Notes : Table 1 - Horizontal clearances to walls, projections, windows, balconies, and areas accessible to pedestrians. 5'0" 5'0" 7'0" 7'6" 8'6" 9'6" 4'6" Neutrals, grounded guys, ungrounded guys exposed to 0 to 300V Services (0 to 750V multiplex) Ungrounded guys exposed to 750V to 22kV Primary (7.2/12.5kV) 69kV 115kV Unguarded rigid live parts & equipment cases (0 to 750V), ungrounded guys (300 to 750V) 5'0" 5'0" 7'0" 7'6" 8'6" 9'6" 4'6" Scope This standard lists the MINIMUM conductor clearances between conductors and structures such as buildings, signs, and flag poles. These clearances are taken from the 2017 edition of NESC Rule 234. Table 3 - Horizontal clearances to signs, chimneys, billboards, radio and TV antennas, and tanks not readily accessible to pedestrians. Conductor DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of CTS CTS 2 5 LB/AH 3/17/04 1150 OVERHEAD CLEARANCE TO STRUCTURES 1 10/17/08 CM AH 2 9/5/16 KJP NESC Minimum Horizontal Clearance (feet) 3'0" 3'6" 5'0" 7'0" 7'6" 8'6" 9'6" Neutrals, grounded guys, ungrounded guys exposed to 0 to 300V Services (0 to 750V multiplex) Ungrounded guys exposed to 750V to 22kV Primary (7.2/12.5kV) 69kV 115kV Unguarded rigid live parts & equipment cases (0 to 750V), ungrounded guys (300 to 750V) Neutrals, grounded guys, ungrounded guys exposed to 0 to 300V Services (0 to 750V multiplex), (does not include building being served) Ungrounded guys exposed to 750V to 22kV Primary (7.2/12.5kV) 69kV 115kV Unguarded rigid live parts & equipment cases (0 to 750V), ungrounded guys (300 to 750V) NESC Minimum Vertical Clearance (feet) Conductor 11'0" 11'0" 13'0" 13'6" 14'6" 15'6" 10'6" Rev. 2 - Updated for 2017 NESC and corrected labels on tables. Neutrals, grounded guys, ungrounded guys exposed to 0 to 300V Services (0 to 750V multiplex), (does not include building being served) Ungrounded guys exposed to 750V to 22kV Primary (7.2/12.5kV) 69kV 115kV Unguarded rigid live parts & equipment cases (0 to 750V), ungrounded guys (300 to 750V) NESC Minimum Vertical Clearance (feet) Conductor 3'0" 3'6" 10'0" 12'0" 12'6" 13'6" 14'6" Table 4 - Vertical clearances over or under building roofs or projections readily accessible to pedestrians. Table 5 - Vertical clearances over or under building roofs or projections not readily accessible to pedestrians Table 6 - Vertical clearances over roofs that are accessible to vehicles less than 8 feet high. Table 7 - Vertical clearances over roofs accessible to truck traffic (vehicles over 8 feet high). Table 8 - Vertical clearances over and under signs, chimneys, billboards, radio and TV antennas, tanks, and other installations not classified as buildings or bridges where the conductor is over or under catwalks and other surfaces where personnel walk. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of CTS CTS 3 5 LB/AH 3/17/04 1150 OVERHEAD CLEARANCE TO STRUCTURES 1 10/17/08 CM AH 2 9/5/16 KJP Rev. 2 - Updated for 2017 NESC and corrected labels on tables. Conductor NESC Minimum Vertical Clearance (feet) 10'6" 11'0" 11'0" 13'0" 13'6" 14'6" 15'6" Neutrals, grounded guys, ungrounded guys exposed to 0 to 300V Services (0 to 750V multiplex) Ungrounded guys exposed to 750V to 22kV Primary (7.2/12.5kV) 69kV 115kV Unguarded rigid live parts & equipment cases (0 to 750V), ungrounded guys (300 to 750V) Conductor NESC Minimum Vertical Clearance (feet) 15'6" 16'0" 16'0" 18'0" 18'6" 19'6" 20'6" Neutrals, grounded guys, ungrounded guys exposed to 0 to 300V Services (0 to 750V multiplex) Ungrounded guys exposed to 750V to 22kV Primary (7.2/12.5kV) 69kV 115kV Unguarded rigid live parts & equipment cases (0 to 750V), ungrounded guys (300 to 750V) Conductor NESC Minimum Vertical Clearance (feet) 10'6" 11'0" 11'0" 13'0" 13'6" 14'6" 15'6" Neutrals, grounded guys, ungrounded guys exposed to 0 to 300V Services (0 to 750V multiplex) Ungrounded guys exposed to 750V to 22kV Primary (7.2/12.5kV) 69kV 115kV Unguarded rigid live parts & equipment cases (0 to 750V), ungrounded guys (300 to 750V) Table 9 - Vertical clearances over and under signs, chimneys, billboards, radio and TV antennas, tanks, and other installations not classified as buildings or bridges where the conductor is over or under portions of such installations where personnel do not walk. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of CTS CTS 4 5 LB/AH 3/17/04 1150 OVERHEAD CLEARANCE TO STRUCTURES 1 10/17/08 CM AH 2 9/5/16 KJP Rev. 2 - Updated for 2017 NESC and corrected labels on tables. Conductor NESC Minimum Vertical Clearance (feet) 3'0" 3'6" 5'6" 7'6" 8'0" 9'0" 10'0" Neutrals, grounded guys, ungrounded guys exposed to 0 to 300V Services (0 to 750V multiplex) Ungrounded guys exposed to 750V to 22kV Primary (7.2/12.5kV) 69kV 115kV Unguarded rigid live parts & equipment cases (0 to 750V), ungrounded guys (300 to 750V) Table 10 - Vetical clearance of service drop conductors, including drip loops, for the building it is serving (see figure 1). Figure 1- Clearances of service drop terminating on support mast 18" 3'-0" 6'-0" Maintain not less than 3'-0" vertical clearance above roof outside of 6'-0" radius from the service mast Maintain not less than 18" vertical clearance above roof within 6'-0" radius from the service mast 4'-0" 6'-0" Elevation View Plan View of Roof DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of CTS CTS 5 5 LB/AH 3/17/04 1150 OVERHEAD CLEARANCE TO STRUCTURES 1 10/17/08 CM AH 2 9/5/16 KJP Rev. 2 - Updated for 2017 NESC and corrected labels on tables. Conductor NESC Minimum Vertical Clearance (feet) Multiplex that does not exceed 750V within 6' radius of service mast which is located no more than 4' from the edge of the roof Multiplex that does not exceed 750V outside 6' radius of service mast 1'6" 3'0" Communications Washington State Highways Joint Usage Comm. 0-750 V 751-15,000 V 15,001-50,000 V 50,001 V And Over DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of DC DC 1 2 CM/DK 11/10/16 1150 OVERHEAD CLEARANCE TO ROADWAYS & OTHER SURFACES DESIGN MINIMUM - NEW CONSTRUCTION Along or crossing roads/streets, alleys, driveways, and parking lots (not state highways) Spaces and ways subject to pedestrians or restricted traffic only Top of rails for railroads (except electrified trolleys) -See page 2 for Burlington Northern Type of Utility Line Lines Crossing Highway Lines Parallel To Highway 25' 21' 25' 35' 35' 40' 21' 21' 25' 35' 35' 40' Design Minimum Vertical Clearances 115 kV 69 kV 12.47 kV Noninsulated Secondary Insulated Secondary & Non-Insulated Communications Effectively Grounded Neutral & Insulated Communications Ground 30' 30' 25' 18' 18' 18' 30' 30' 25' 14' 14' 14' 40' 40' 30' 25' 25' 25' 1. See tables that follow for other surfaces and span guys. 2. See Std COR - Overhead Clearance to Roadways and Other Surfaces - Section 1150 for NESC minimums. 3. Proposed exceptions to these clearances require approval from CPU Engineering. Notes : DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of DC DC 2 2 CM/DK 11/10/16 1150 OVERHEAD CLEARANCE TO ROADWAYS & OTHER SURFACES DESIGN MINIMUM - NEW CONSTRUCTION Front Top View With Doors Closed Front view with doors closed (see Note 2) MINIMUM DISTANCE REQUIRED FROM STRUCTURES TO PADMOUNTED TRANSFORMERS x 10 ft. to any windows, doors, stairways, or openings on all structures. x 3 ft. clear area in back and sides of unit to allow working on equipment. x 10 ft. from any structure or roof overhang consisting of combustible material. x 3 ft. to non-combustible structures having no openings closer than 10 ft. x Proposed exceptions to these clearances require approval from CPU Engineering. Notes : 1. Customer must provide documentation for non-combustible. 2. Locate front of padmounted transformer away from building walls or other barriers to allow for safe working practices. Doors of enclosures and transformers must face towards the driving access unless otherwise approved. No vegetation in this work space is permitted. 3. Consult CPU Residential Electric Service Handbook for any additional required clearances to building doors, windows, fire escapes, air vents, etc. 4. Where exposed to motorized vehicles (less than 5 feet from a drivable surface), the customer must install and maintain CPU approved barrier to protect padmounted transformer and other equipment. See CPU Std UTP9. 5. Locate transformers no less than 5 feet and no more than 10 feet from a maintained drivable surface unless otherwise approved by CPU. 6. All distances shall also apply to tree trunks and major root systems. 25 1234 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of UPTC UPTC 1 1 JEH 2/22/00 1150 PADMOUNT TRANSFORMER CLEARANCES 0 0 2/22/00 HWH MA 1 5/30/07 LB AH 2 11/10/16 CM DK 10' 3' 3' 3' 3' 10' 10' 10' Non-combustible Combustible 10' MINIMUM WORKING CLEARANCE REQUIRED 10 ft. clear area in front of unit to allow use of 8' hot sticks (see Note 2). WARNING 10' Rev. 2 - Corrected measurement points and removed conductor location note. | 02/11/25 |
| Section 1200 - UG General & Trenching | 02/11/25 |
| Section 1300 - UG Risers, Cables & Connectors | 02/11/25 |
| Section 1400 - UG Transformers | 02/11/25 |
| Section 1500 - UG J-Boxes & Vaults | 03/15/23 |
| Section 1600 - 1000 MCM Cable | 01/28/26 |
| Section 1610 - Vault RoomsN New Stabdard R Redrawb Stabdard C Chabged Stabdard ~ No Chabge 161b V AULT R OOM 3/15/2010 N COVR Customer-Owbed Vault Room Requiremebts DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 1 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS TOPIC SEE PAGE Vault rooms shall be designed and constructed so they will be considered separate buildings under IBC 705. The vault room shall meet the requirements of NEC Article 450, Part III. Raceways shall be designed and constructed so they will be considered outside the building under NEC 230.6. Nothing in this standard shall be interpreted to conflict with the regulations of the State of Washington or other regulatory bodies that have jurisdiction. This standard documents requirements for customer-owned vault rooms containing equipment owned, operated, and maintained by Clark Public Utilities. Scope In This Standard Code Requirements CODE REQUIREMENTS 1 VAULT ROOM AVAILABILITY 2 VAULT ROOM LOCATION 2 CIRCUIT DESIGN CRITERIA 2 VAULT ROOM GENERAL REQUIREMENTS 3 TRANSFORMERS 6 J-BOXES 9 SWITCHES 9 CABLE AND CABLE RACKING 13 DUCT SYSTEMS 15 GROUNDING 15 SYSTEM PROTECTION 15 PERSONNEL ACCESS 16 FIRE DETECTION AND SUPPRESSION 18 OIL CONTAINMENT 18 VENTILATION 18 LIGHTING AND OUTLETS 20 APPROVAL DRAWINGS 20 PULLING EYES 5 SIGNAGE 16 VIBRATION DAMPERS 8 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 2 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS Equipment installed in a vault room shall not serve any other buildings. The equipment inside the vault room shall have the ability to be de-energized from outside the vault room without causing a permanent outage to other customers. The intent of this is to be able to de-energize the vault room in case of a fire or other hazardous circumstance. All vault room locations must be reviewed and approved by the Clark Construction Design Engineer. Vault rooms should be located at grade level adjacent to the exterior wall or under the sidewalk that is closest to Clark's existing distribution system. All vault rooms must have direct access with a boom truck. In all cases, the location shall be accessible by a door, removable wall, or ceiling to an outside location where Clark can reach the transformer, switchgear and related equipment for installation, maintenance and replacement. The customer shall provide a location where Clark crews will have 24-hour access to operate the equipment. Clark Public Utilities' preferred design is to use padmounted equipment installed outdoors. Equipment installed in a vault room is only allowed if the customer demonstrates that an outdoor installation is physically impractical, an undue hardship, or required by a government authority. Aesthetics alone is not adequate justification. Approval for use of a vault room must be obtained from the Clark Design Engineer prior to submitting a vault room design for review. Vault Room Availability Vault Room Location Circuit Design Criteria DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 3 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS Equipment, pipes, ducts, wires, and other fixtures allowed in a vault room shall be a necessary part of the Clark electrical installation. All items must be approved by the Clark Construction Design Engineer. No foreign fixtures may pass through a vault room or a cable room. This includes water or sewer pipes, or any other equipment that may require inspection or service by the customer. Vault rooms shall not be accessible to unqualified personnel. Vault rooms shall not be used as temporary or permanent storage spaces. All metering equipment and customer equipment, other than service conductors or bus, shall be located outside of the vault room. What is Allowed in the Vault Room Test and energize new facilities Terminate primary cables in any energized facilities Upon energizing the facilities, Clark will assume ownership of and maintain all primary cables and conduits, transformers, junction boxes, and other primary voltage equipment. Clark Public Utilities Responsibilities Customer Responsibilities Continued on next page Vault Room General Requirements Approval for use of a vault room must be obtained from the Clark Design Engineer prior to submitting a vault room design for review. The customer is responsible for providing and installing all facilities. All materials must comply with Clark technical standards and be supplied from Clark's material list by an approved distributor. All Clark primary voltage facilities must be installed per Clark technical standards by a contractor on Clark's list of approved electrical contractors. Customer General Responsibilities Vault room located either inside or on the exterior of the building constructed as specified in NEC 450, Section III, Transformer Vaults. Personnel and equipment access doors. Restricted room access to qualified utility workers only. See WAC 295-45-035. Smooth floor surface for rolling/sliding of equipment if access for installation and removal is not directly above transformer. Fire detection equipment (smoke and temperature). Portable ABC fire extinguisher outside access door(s). Any additional equipment or systems required by local fire officials. Clark does not allow water fire suppression in vault rooms. Adequate ventilation for cooling of equipment. The customer will provide, install, and maintain the following: Vault Room Requirement Location, Design, Layout, and Access Fire Detection/ Suppression Ventilation DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 4 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS Ground bus for equipotential zone. Oil containment sills, sumps, oilwater separators, drains, and valves Inserts, ducts, or knockouts in the wall for entrance and termination of ducts for primary cable, and Clark Communications cables. Pulling inserts/hooks for installation of cables. Racking for primary and secondary service cables. Room lighting, emergency lighting, and convenience outlets. All service cables, rigid bus, and supports up to the point of interconnection. Drawings for approval by Clark Public Utilities Construction Design Engineer. All electrical systems, components, and elements, including supporting structures and attachments, shall be installed in accordance with the International Building Code (IBC), Section 1621. The vault room shall be designed so the noise and vibration from the transformer, fans, and other equipment, is not objectionable to the tenants of the building. Customer to install "Warning" and "Danger" signs provided by Clark Switch rooms shall be labeled w/ switch number provided by Clark Transformer rooms shall be permanently marked w/ 2" phenolic numbers and letters (i.e. Transformer 1234-2500.) Ground Bus Seismic Oil Containment Duct and Cable Racking Lighting and Outlets Service Conductors Approval Drawings Noise and Vibration Signage The customer will provide all copies of keys to Clark. The customer will not keep copies of any keys to the vault room. Keys DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 5 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS Pulling eyes are required in Clark's vaults. Pulling eye number, location, and height shall be determined and approved by the Clark Construction Design Engineer. The location of pulling eyes should be chosen to facilitate moving electrical equipment, including cable, to be located in or removed from the vault. Minimally, but without duplication, pulling eyes for rigging equipment shall be installed as follows: x opposite the entry door (one); x adjacent to the entry door (one); x centered on each wall without a center door; x opposite each conduit entrance at approximately the same height (one); x adjacent to one side of each conduit entrance (one); x for vaults with ceiling hatches for transformer installation and removal, pulling eyes should be installed adjacent to the hatches (two); and x similarly, for conduits entering through the ceiling or the floor, pulling eyes should be installed adjacent and opposite the conduit entrances (two). Locations for pulling eyes can vary depending on the vault plan and configuration (entry door, conduit entrance, hatch, and transformer locations). Clark prefers that pulling eyes on walls shall be at a height of 26 inches from the floor although for conduit entrances, the height of the pulling irons should approximately match the height of the conduits. If the vault is constructed of concrete blocks, eyes may be floor-mounted. Pulling eyes shall be installed with the following requirements: x Pulling eyes shall be made of stainless steel. x Pulling eye installation shall be rated and labeled in the vault as 10,000 pounds pulling strength. x Install pulling eyes behind concrete reinforcing rebar steel ( Note : spacing and size of rebar to be determined by a licensed civil engineer.). Pulling Eyes Top View Front View (Inside Vault) Side View Pulling Eyes Shown Embedded in Concrete Vault Walls Behind Reinforcing Steel Inside Vault Inside Vault Note : Eyes typically opposite entry doors or conduit entrance. Rebar Pulling Eye Rebar Pulling Eye Rebar Pulling Eye Dimensions and Clearances The opening or hatch and transformer must be in a location on the property where it is accessible by lift equipment that is owned by Clark or its normal utility contractor. The hatch must be equipped with Clark's standard lifting inserts or the customer shall provide any non-standard lifting devices for use with the rigging of a mobile crane. The access hatch may be one piece or in sections. No portion of the hatch shall weigh more than 15,000 pounds. A personnel access door shall be provided. Installing and Removing If the vault room is at grade level adjacent to an exterior wall, the vault room will have a 10' x 10' equipment door on the exterior wall so the transformer can be moved by a boom truck. If the vault room is in the sidewalk, the vault room can be open on top to the outside air and have a minimum 12-foot by 12-foot clear opening obtained by removing an access hatch. Vault rooms shall be a minimum of 24' x 20'. The minimum equipment entry door size shall be 10' x 10'. The minimum ceiling height shall be 12'. Minimum clearances for transformers are 10 feet in front, 3 feet sides and back, and 5 feet above. See Figures 1 and 2. Note : The customer is responsible for removal and replacement of any seals or coverings in preparation for installation or removal of equipment. Transformers DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 6 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS Equipment Door If equipment shall be installed and removed through a wall, the minimum access door required is 10 feet wide by 10 feet high. Variance If the preferred method for installation and removal are not met, the customer must get a written variance from the Clark Construction Design Engineer. Multiple Transformers If multiple transformers are required to serve a facility, they will be required to be placed in separate rooms to keep an equipment failure of one transformer from damaging or preventing access to the other equipment. 2000 to 2500kVA Transformers These transformers require a S&C Vista switch, whether inside or outside the building, for system protection. Service Conductors The number of available secondary transformer connections is 8 conductors per phase. If more are needed, contact the Clark Design Engineer. Continued on next page Insulating Fluid All vault room transformers shall be filled with natural ester fluids. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 7 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS COVR Mandatory personnel access door on switch side when there are no equipment doors To Customer Switchgear Bus Stub, Flange or Conduit Transformer 10' Min. working space needed to operate transformer. Figure 1: Transformer vault room (top view) 20' Min. 24' Min 10' Max 10' Doors 10' Min Clear Space 3'-0" 3'-0" Continued on next page Pulling eye adjacent to equipment door Pulling eye in ceiling Pulling eye adjacent to & opposite conduit entrance Pulling eye in center of wall 12' x 12' min. lift out panel to remove transformer from vault Pulling eye in ceiling 3'-0" DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 8 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS COVR 12' 20' Min 3' Min 36" Radius Customer Service Cables From Above 10' x 10' doors required if the transformer will be removed through these doors. Access Hatch Figure 2: Transformer vault room (side view) Incoming Ducts Vibration Dampers Transformers installed in customer-owned vaults must be placed on vibration dampening pads to isolate the building from transformer vibrations and noise. 5' Min. T W L Transformer Front View Top View W L T DESCRIPTION 4" 8" 1/2" Pad, Vibration Dampening A B XFMR WT. ITEM DESCRIPTION QTY A Pad, Vibration Dampening 4"x8"x1/2" 4 6,400lb. 9,600lb. 17,000lb. B Tubing, Rectangular Steel 4"x2"x60" 2 A Pad, Vibration Dampening 4"x8"x1/2" 6 B Tubing, Rectangular Steel 4"x2"x60" 3 A Pad, Vibration Dampening 4"x8"x1/2" 9 B Tubing, Rectangular Steel 4"x2"x60" 3 12' 4" 60" 2" Tubing, Rectangular Steel, 1/8" Wall, Hot-Dipped Galvanized DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 9 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS COVR The junction bushings shall be mounted 36 inches above the floor The cables shall be racked on the wall and not laid on the floor. The cables shall be secured to the racking. The racking shall be supplied and installed by the customer. The racking must be approved by Clark's Standards Engineer. The portions of the cables close to the elbow shall be free to move and not be trapped under other cables. There shall be enough slack to easily move the elbows from the junction bushings to the stand-off brackets. The cable shall not come out of the floor directly below the junction bushings because this does not provide adequate slack. The cables may approach the racking from above, or below, or a combination. A 10-foot by 10-foot working space shall be provided in front of the junction bushings. When space is not available for the normal exterior junction vault, junction bushings may be installed on a wall in a separate vault room. Use of interior junction bushings should be avoided whenever possible to reduce access times during emergency conditions. If junction boxes are installed in a vault room, the space must be designed to accommodate the following: Continued on next page J-Boxes The preferred design when switches are required to serve a new customer is to have them set outside the building and above ground (padmounted). If they cannot be located outside of the building, they must be placed in a vault room separate from the transformer. The switches required for vault rooms are the S&C "Vista" switch. Transformers greater than 1500kVA will require a S&C "Vista" switch, whether inside or outside the building, for system protection. Room Dimensions and Clearances Vault rooms for switches shall be a minimum of 24' x 15'. The minimum ceiling height shall be 12'. Vault rooms shall provide a minimum working space of 10 feet deep and 8 feet wide from the control panel side of the switch, and 3 feet on the sides. The minimum equipment entry door side shall be 10' x 10'. The room shall be a minimum of 8 feet from the floor to the cable racks above. See Figures 3 and 4. Switches DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 10 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS COVR The opening or hatch and switch must be in a location on the property where it is accessible by lift equipment that is owned by Clark or its normal utility contractor. The hatch must be equipped with Clark's standard lifting inserts or the customer shall provide any non-standard lifting devices for use with the rigging of a mobile crane. The entire access hatch, if one piece, or each section, must weigh 15,000 pounds or less. x The preferred method of installing and removing the switch is by a boom truck. The door shall be 10' x 10'. The vault room can be open on top to the outside or have a minimum 10' x 10' opening for a S&C "Vista" switch obtained by removing an access. Installing and Removing the Switch Note : The customer is responsible for removal and replacement of any seals or coverings in preparation for installation or removal of equipment. Equipment Door If equipment shall be installed and removed through a wall, the minimum access door required is 10 feet wide by 10 feet high. Multiple Switches If multiple switches are required to serve a facility, they will be placed in separate rooms to keep an equipment failure from damaging or limiting access to the other equipment. Continued on next page x x DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 11 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS COVR Mandatory Personnel Access Door When There Are No Equipment Doors Figure 3: Vista Switch Vault Room (Top View) 3' Equipment Door 10' x 10' 24' Min. Primary Ducts Continued on next page Pulling eye in ceiling 15' Min. Access Hatch Equipment Door 10' x 10' Vista Switch wall mounted 35" DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 12 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS COVR Figure 4: Vista Switch Vault Room (Side View) Personnel Access Door Access Hatch 8' Min to Cable Rack 24" Tank is 35" wide. Anchor brackets are 37" apart. 3' min Primary Ducts Vista Switch wall mounted Equipment Access Door Jumper wires for isolation 12' min DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 13 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS COVR Cable Bending Radius The minimum bending radius of any primary or secondary cable shall not be less than 36 inches. Space shall be provided for entry and training of the primary and secondary cables. Clearance Responsibilities Customer's Responsibilities Furnish, install, and maintain the service cables. Furnish all conduit and racking inside the building required to bring the primary and service conductors to the switchgear and/or transformer. Clark's Responsibilities Maintain the primary voltage cables. Cable and Cable Racking Furnish and install the primary 1/0 cables. Furnish and install the primary 1000MCM cables. Terminate 1/0 cable Terminate 1000MCM cable The service cables must be completely supported to keep the weight of the cables from damaging the transformer secondary bushings. The customer supplies the service conductors to the secondary lugs of the transformer and terminates. The number of available secondary transformer connections is 8 conductors per phase. Service Conductors Conduits opening to the building interior shall be firestopped. To ensure oil containment, secondary conduits shall be installed a minimum of 24 inches above the vault floor. Figure 5 shows a typical detail for encasing ducts entering through the vault floor. Continued on next page DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 14 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS COVR 2' Min. Wall Floor E C n o c n a c s r e e m t e e n t Conduit Figure 5: Encasing Ducts For Oil Containment DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 15 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS COVR Responsibilities Customer's Responsibility Provide a primary duct system from the vault room(s) to a location outside the facility as specified by Clark. Provide raceways for Clark conductors that meet the requirements of NEC 230.6. Sealing the exterior of all ducts or inserts for ducts where they penetrate through the outside of the building or vault rooms. Firestop all conduits leaving the vault room except 1000MCM conduits. Clark's Responsibility Design the duct system to be used by specifying the type, size, location, and number of conduits Firestop all 1000MCM conduits leaving the vault room Duct Systems The customer is responsible for installing a ground bus along the back wall of the vault room. The ground bus will be a 4/0 copper conductor. The ground bus will be located 1 foot above the floor and must not cross any access doors. The ground bus shall be tied to the building's grounding electrode system and building reinforcing structure to create an equal potential zone in the vault room. This requires inspection by Clark prior to pouring concrete. The ground bus shall be tapped to each piece of equipment (not daisy-chained), so the ground wire to one piece of equipment can be cut without leaving other pieces of equipment ungrounded. Clark will provide overcurrent protection for the primary side of the transformer but does not provide any protection on the secondary side of the transformer for the customer's service cables. Grounding System Protection DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 16 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS COVR A direct and unobstructed rescue/escape route through a personnel access door shall be provided from every working space where an operator will stand when he/she operates a switch in or on a sealed piece of equipment (a S&C "Vista" switch or a 200-amp elbow on a piece of equipment). The personnel access door allows 24-hour access to the vault room from outside the building. The access shall meet NESC Section 113. Doors shall be designed for Clark's Substation lock cores or have a Vinter Changeable Hasp installed to accept a Clark padlock with a 3/8-inch shank. Personnel access doors can be a standard size (3' x 6'8" min). All standard-size access doors into the vault room shall open outward and shall be equipped with panic bars, pressure plates or other devices that are normally latched but open under simple pressure. Equipment access doors (hinged or roll-up) must be a minimum of 10 feet wide. Bollards may be required to protect access to the vault room. Personnel Access Door to Transformers and Switches Signage All vault rooms shall have "Warning" signs on the outside of all access doors and "Danger" signs on the inside of all access doors in accordance with ANSI Z535. Clark will provide the signs to the customer. The customer is responsible for installing them at a height of 5' to the top of the sign from the floor. The customer will provide and install 2" phenolic numbers and letters 3" below the "Warning" sign with the name of the equipment and the equipment number. Clark will provide the switch number label. See Figures 6 and 7. If a roll-up door is used for equipment access, the "Warning" signs, "Danger" signs, and phenolic letters and numbers can be placed on the concrete wall on the side of the door at the same heights. Placards will be used instead of adhesive signs. Continued on next page DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 17 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS COVR Figure 6: Outside of Access Doors to Vault Room Transformer Vault Room Switch Vault Room WARNING Transformer 1234-500 5'-0" 3" WARNING Switch 12-4567 5'-0" 3" Floor Figure 7: Inside of Access Doors to Vault Room DANGER 5'-0" Floor DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 18 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS COVR The vault room shall be built to meet the NEC 450 Section III and the IBC 705. A portable ABC-rated fire extinguisher shall be located outside each personnel access door. The customer is responsible for keeping the fire extinguisher up to date. Fire detection equipment (smoke and temperature) shall be located where they can be tested and maintained without climbing over or on top of transformers or switches. Requirements for Customer-owned Vault Rooms Electrical fires and oil fires are not easily controlled by sprinklers. Water sprayed on burning oil can cause frothing and boilover. If the capacity of the containment system is exceeded, flaming oil can overflow and expand the scope of a fire. For these reasons, Clark does not recommend water sprinkler systems in vault rooms. If the local fire department requires a sprinkler system in the room, a containment system shall be installed that is sized to adequately handle the water volume of the room's sprinkler system, plus the volume of oil of the transformer. Water Sprinkler Systems in Vault Rooms The transformer vault room shall include an oil containment system that can store 500 gallons of oil. Floor drains are not allowed in Clark's vault rooms. Removable or breakable sills may be required at each access door. Fire Detection and Suppression Oil Containment Continued on next page Natural Circulation The preferred method of ventilation is natural circulation to the outside air. The minimum net clear area required for natural ventilation is 3 square inches for each kVA of transformer capacity (see Table 3). Only the area of the opening shall be included in this calculation and not the area occupied by a screen or grating if present. All the ventilation area may be in the ceiling or along the walls, but not within 2' of the floor. Ventilation DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 19 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS COVR Forced-Air If natural ventilation to the outside air is not available, forced ventilation will be provided. The minimum cubic feet per minute (c.f.m.) of airflow will be 1.6 times the transformer capacity in kVA (shown in Table 3). Forced ventilation will be controlled by a thermostat set to come on at 86 degrees Fahrenheit and turn off at 140 degrees Fahrenheit. If the room temperature exceeds 140 degrees Fahrenheit, an alarm shall sound in the building management system. All ventilation openings to the inside of the building will be supplied with automatically closing fire dampers. All ventilation openings will be to the outside of the building to prevent smoke damage. The c.f.m. airflow factor of 1.6 times the kVA was obtained using the following formula: Q = (3.16 x WL) (t i - t 0 ) Where: Q = Rate of air transfer in c.f.m. WL= Transformer full load loss in watts t i 0 D [ L P X P D O O R Z D E O H W H P S H U D W X U H L Q Y D X O W R U ƒ ) ƒ & t o , Q F R P L Q J D P E L H Q W D L U W H P S H U D W X U H R U ƒ ) ƒ & Airflow Factor Formula Table 3 Minimum net clear opening required for natural ventilation or c.f.m. for forced ventilation Natural Ventilation Transformer (kVA) (Sq Ft) (Sq In) (C.F.M.) 300 500 750 1000 1500 2000* 2500* 6.25 10.41 15.63 20.82 31.23 41.64 52.05 900 1500 2250 3000 4500 6000 7500 480 800 1200 1600 2400 3200 4000 Forced Ventilation * Require S&C "Vista" switch for system protection. DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of COVR COVR 20 20 CM/AH 2/1/10 1610 CUSTOMER-OWNED VAULT ROOM REQUIREMENTS COVR These are the requirements for lighting and outlets in vault rooms: All four sides of the equipment shall be illuminated. Vault room lighting shall be provided at a rate of 3 watts per square foot of floor space. The light switch shall be located inside the vault room next to the personnel access doorway. Emergency lighting shall be provided as specified in the NEC-700, Emergency Systems. A 120-volt duplex convenience receptacle shall be provided on two opposite walls of the vault. The customer shall provide an additional convenience outlet to power a communication enclosure required by Clark Public Utilities for supervisory and data acquisition controls for switch rooms. All branch lighting and outlet circuits serving the vault room shall be tied to the facility's emergency generator panel. The customer shall be responsible for providing detailed construction drawings, for Clark Public Utilities' approval, outlining: The dimensions, layout, and location within the building of vault rooms, given in both plan and profile Load bearing capabilities of all areas subject to equipment loads Access doors Oil containment Ventilation Lighting and outlets Knockouts or inserts for Clark's ducts entering the vault Grounding system. Fire detection system and fire extinguisher location. Fire rating of vault room walls, floor, ceiling and doors/hatches Equipment removal plan if not by boom truck through an exterior door or through an opening or access hatch directly over the equipment. Customer's secondary bus system and supports Support system for primary cable runs Responsibilities Customer Design Responsibilities Shall provide the vault room drawings during the preliminary design stage of the project. Clark's Design Responsibilities Shall review and approve vault room design drawings in a timely fashion. Lighting and Outlets Approval Drawings | 03/15/10 |
| Section 1700 - UG Secondary | 02/11/25 |
| Section 1790 - Transmission Basic UnitsN New Standard R Redrawn Standard C Changed Standard ~ No Change 1790 T RANSMISSION B ASIC U NITS 12/30/2020 ~ TPR1 , - LC Vertical Line Post Insulator ~ TPR2 , - LC Horizontal Line Post Insulator C TPR3 , - LC Double Horizontal Line Post Insulator ~ TPR4 , - P Suspension Insulator Swing Corner ~ TPR5 Deadend Assembly 336 ACSR to 900 ACSR Bare ~ TPR5P Deadend Assembly 1557 ACSR/TW C TPR6 Double Deadend Assembly 336 ACSR to 900 ACSR Bare N TPR6P Double Deadend Assembly 1557 ACSR/TW Washer, Lock, Spring, Double Coil, Galv., 7/8" 4 5 3 Washer, Curved, Cast, 4" x 6" DESCRIPTION Bolt, Machine, 7/8" x 16", Galv., 25,400 lb Ultimate Tensile 2 2 2 1911 2351 1901 QTY. TPR1LC S/N Insulator, Line Post Vertical, 115kV, 3180 lb Ultimate Cantilever 1 1 2345 Clamp, Clamptop, 795 AAC to 1557 ACSR/TW Bare 2 1 316 ULTIMATE CANTILEVER 3180 lb 4'-4" 1'-8" 1'-0" 2 1 5 3 4 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of TPR1,TPR1LC TPR1 1 1 8/1/01 1790 115kV TRANSMISSION BASIC UNITS VERTICAL LINE POST INSULATOR 795 AAC TO 1557 ACSR/TW BARE 1 3/28/02 HWH DLK 2 1/4/17 CM DK 3 5/4/20 JK 7" 1'-7" 1'-0" Rev. 3 - Updated Ultimate Cantilever rating. Install split bolt 2 2 2 1911 2351 1901 QTY. TPR1 S/N 1 2345 1 317 For 336 ACSR or 397 AAC bare, use Std TPR1LC. Note : NO. ITEM 4 5 3 Washer, Lock, Spring, Double Coil, Galv., 7/8" Washer, Curved, Cast, 4" x 6" Bolt, Machine, 7/8" x 16", Galv., 25,400 lb Ultimate Tensile 1 2 DESCRIPTION Insulator, Line Post Horizontal, 115kV, 3200 lb Ultimate Cantilever 2 2 2 1911 2351 1901 S/N QTY. 1 1 2346 316 TPR2LC ULTIMATE CANTILEVER 3200 lb 1'-4.6" 5'-0" 5 3 4 1 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of TPR2,TPR2LC TPR2 1 1 1/31/82 1790 115kV TRANSMISSION BASIC UNITS HORIZONTAL LINE POST INSULATOR 795 AAC TO 1557 ACSR/TW BARE 1 2/22/00 REDRAWN IN CAD 2 1/4/17 CM DK 3 5/4/20 JK ULTIMATE TENSION 5000 lb 2 Clamp, Clamptop, 795 AAC to 1557 ACSR/TW Bare 1'-0" Rev. 3 - Updated Ultimate Cantilever rating. For 336 ACSR or 397 AAC bare, use Std TPR2LC. Note : 2 2 2 1911 2351 1901 S/N QTY. 1 1 2346 317 TPR2 NO. ITEM 4 3Washer, Lock, Spring, Double Coil, Galv, 7/8" Bolt, Double Arm, 7/8" x 26", Galv, 25,400 lb Ultimate Tensile 1 2 DESCRIPTION Insulator, Line Post Horizontal, 115kV, 3200 lb Ultimate Cantilever 4 2 2351 2983 S/N QTY. 2 2 2346 316 TPR3LC 5'-0" 1'-4.6" 1'-0" 4 3 1 2 DATESECTION APP: R CONSTRUCTION STANDARDS DATE:ENGR REVISIONS OPS CAD FILE: PAGE: of TPR3,TPR3LC TPR3 1 1 LB/AH 8/1/01 1790 115kV TRANSMISSION BASIC UNITS DOUBLE HORIZONTAL POST INSULATORS 795 AAC TO 1557 ACSR/TW BARE 1 3/28/02 HWH DLK 2 1/4/17 CM DK 3 5/4/20 JK 4 12/28/20 KJP ULTIMATE TENSION 5000 lb ULTIMATE CANTILEVER 3200 lb Clamp, Clamptop, 795 AAC to 1557 ACSR/TW Bare Rev. 4 - Changed machine bolts to DA bolts. For 336 ACSR or 397 AAC bare, use Std TPR3LC. Note: 4 2 2351 2983 S/N QTY. 2 2 2346 317 TPR3 NO. ITEM Detail A DA Bolt Nuts Spring Washer Round Washer See Detail A 5 Washer, Flat Round, Galv, 7/8" 4 2978 4 2978 5 6 5 Bolt, Machine, 7/8" x 16", Galv., 25,400 lb Ultimate Washer, Lock, Spring, Double Coil, Galv., 7/8" 1 2 DESCRIPTION Insulator, Suspension, Polymer, 115kV, 30,000 lb Ultimate Clevis, Y-Ball, 30,000 lb Ultimate 2 2 2351 1901 QTY. S/N 1 1 2350 320 TPR4P 3 Clamp, Suspension, 336 ACSR To 900 ACSR Bare, 25,000 lb Ultimate 1 308 4 Plate, Pole Eye, 36,000 lb Ultimate 2 1908 ULTIMATE LOAD 30,000 lb ULTIMATE LOAD 42,000 lb @ 45° 7/8" BOLT (2) 25,400 lb ea. ULTIMATE LOAD 36,000 lb HORIZONTALLY LOAD LIMITS ULTIMATE LOAD 25,000 lb ULTIMATE LOAD 30,000 lb 3 1 2 5 6 4 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of TPR4,TPR4P TPR4 1 1 8/1/01 1790 115kV TRANSMISSION BASIC UNITS SUSPENSION INSULATOR-SWING CORNER 336 ACSR TO 900 ACSR BARE 1 3/28/02 HWH DLK 2 1/4/17 CM DK 3 2/11/19 KJP ULTIMATE LOAD 25,000 lb 4'-2" 7 4" 7 1 1681 Socket/Eye, 13/16" Eye, 1" Wide Base Rev. 3 - Updated suspension clamp rating. For 1557 ACSR/TW bare, use Std TPR4P. Note : 2 2 2351 1901 QTY. S/N 1 1 2350 320 TPR4 1 307 2 1908 1 1681 NO. ITEM 6 5 1 2 DESCRIPTION 2 2 2351 1901 QTY. S/N 1 1 2350 320 TPR5 4 2 1908 1 4 2 6 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of TPR5 TPR5 1 1 8/1/01 1790 115kV TRANSMISSION BASIC UNITS DEADEND ASSEMBLY 336 ACSR TO 900 ACSR BARE 1 3/28/02 HWH DLK 2 8/23/17 CM DK Bolt, Machine, 7/8" x 16", Galv., 25,400 lb Ultimate Washer, Lock, Spring, Double Coil, Galv., 7/8" Insulator, Suspension, Polymer, 115kV, 30,000 lb Ultimate Clevis, Y-Ball, 30,000 lb Ultimate Plate, Pole Eye, 36,000 lb Ultimate 3 3 Clamp, Strain, 336 ACSR to 900 ACSR, Deadend, 30,000 lb Ultimate 1 2467 4'-2" Rev. 2 - Deleted TPR5A w/ split bolt, updated materials, and added note. NO. ITEM ULTIMATE LOAD 30,000 lb ULTIMATE LOAD 30,000 lb 7/8" BOLT (2) 25,400 lb ea ULTIMATE LOAD 36,000 lb HORIZONTALLY ULTIMATE LOAD 30,000 lb LOAD LIMITS 4'-2" For 1557 ACSR/TW bare, use Std TPR5P. Note : 5 ULTIMATE LOAD 30,000 lb 6 5 1 2 DESCRIPTION 2 2 2351 1901 QTY. S/N 1 1 2350 320 TPR5P 4 2 1908 1 4 2 6 5 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of TPR5P TPR5P 1 1 5/6/1996 1790 115kV TRANSMISSION BASIC UNITS DEADEND ASSEMBLY 1557 ACSR/TW 1 1/4/17 CM DK Bolt, Machine, 7/8" x 16", Galv., 25,400 lb Ultimate Washer, Lock, Spring, Double Coil, Galv., 7/8" Insulator, Suspension, Polymer, 115kV, 30,000 lb Ultimate Clevis, Y-Ball, 30,000 lb Ultimate Plate, Pole Eye, 36,000 lb Ultimate ULTIMATE LOAD 30,000 lb 3 3 Deadend Compression, W/ Jumper, Terminal Pad, 1557 ASCR/TW 1 2421 7 4'-2" Rev. 1 - Changed from TSVDE-P to TPR5P. 7 1 333 Clevis, Socket, 30,000 lb Ultimate NO. ITEM 6 5 NO.1 2 ITEM DESCRIPTION 4 2 2351 2980 QTY. S/N 2 2 2350 320 TPR6 3 2 2467 4 2 1908 ULTIMATE LOAD 30,000 lb ULTIMATE LOAD30,000 lb 7/8" BOLT (2) 25,400 lb ea ULTIMATE LOAD36,000 lb HORIZONTALLY ULTIMATE LOAD 30,000 lb LOAD LIMITS 1 3 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE:ENGR REVISIONS OPS CAD FILE: PAGE: of TPR6 TPR6 1 1 CM/DK 1/4/17 1790 115kV TRANSMISSION BASIC UNITS DOUBLE DEADEND ASSEMBLY 336 ACSR TO 900 ACSR BARE 1 12/28/20 KJP Bolt, Double Arm, 7/8" x 20", Galv, 25,400 lb Ultimate Washer, Lock, Spring, Double Coil, Galv, 7/8" Insulator, Suspension, Polymer, 115kV, 30,000 lb Ultimate Clevis, Y-Ball, 30,000 lb Ultimate Clamp, Strain, 336 ACSR to 900 ACSR, D.E., 30,000 lb Ultimate Plate, Pole Eye, 36,000 lb Ultimate ULTIMATE LOAD 30,000 lb ULTIMATE LOAD30,000 lb 4'-2" 7 7 2 1681 Socket/Eye, 13/16" Eye, 1" Wide Base For 1557 ACSR/TW bare, use Std TPR6P. Note: Detail A DA Bolt Nuts Spring Washer Round Washer See Detail A 5 2 6 5 4 Rev. 1 - Changed machine bolts to DA bolts. 8 4 2978 Washer, Flat Round Galv, 7/8" 6 5 1 2 DESCRIPTION 4 2 2351 2980 QTY. S/N 2 2 2350 320 TPR6P 4 2 1908 DATE SECTION APP: R CONSTRUCTION STANDARDS DATE: ENGR REVISIONS OPS CAD FILE: PAGE: of TPR6P TPR6P 1 1 KJP 12/28/20 1790 115kV TRANSMISSION BASIC UNITS DOUBLE DEADEND ASSEMBLY 1557 ACSR/TW Bolt, Double Arm, 7/8" x 20", Galv, 25,400 lb Ultimate Washer, Lock, Spring, Double Coil, Galv, 7/8" Insulator, Suspension, Polymer, 115kV, 30,000 lb Ultimate Clevis, Y-Ball, 30,000 lb Ultimate Plate, Pole Eye, 36,000 lb Ultimate 3 Deadend Compression, W/ Jumper, Terminal Pad, 1557 ASCR/TW 2 2421 7 2 333 Clevis, Socket, 30,000 lb Ultimate NO. ITEM 8 4 2978 Washer, Flat Round Galv, 7/8" ULTIMATE LOAD 30,000 lb 4'-2" ULTIMATE LOAD 30,000 lb 4'-2" 1 4 2 6 5 3 7 8 LOAD LIMITS Detail A DA Bolt Nuts Spring Washer Round Washer See Detail A | 5/13/24 |
| Section 1800 - Transmission | 02/11/25 |
| Section 1910 - Joint Use | 12/04/25 |
Additional resources for contractors
- Technical specifications for single-phase padmounted transformers
- Technical specifications for three-phase padmounted transformers
- Technical specifications for 1/0 Primary Cable
- Technical specifications for 600 Volt Cable
- Approved materials list for contractors
- Multiple meter labeling detail and instructions
- Secondary trench detail and corrections check sheet
- Contractor Connection Newsletter