okonite ampacity tables_ single conductor electrical cable underground direc

Okonite Ampacity Tables: Single Conductor Electrical Cable Underground Direct Burial

http://www.okonite.com/engineering/single-conductor-underground-direct.html[20-04-2015 14:09:17]

Ampacity Tables Single Conductor Underground Direct Burial

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Single conductor cable direct burial1/C group buried 36 deep with cables laid on 7-1/2 centers, open circuited shield operation, i.e. shields bonded and grounded at one point only.Earth ambient temperature 20C Earth thermal resistivity RHO 90 100% load factor

One circuit three cables

one conductor Copper - direct burial one conductor Aluminum - direct burial

Conductor Size AWG-kcmil

Non-Shielded Shielded

600-2000 Volts Ampacity



90 C (194F)

90 C (194F)

105C (221F)

90 C (194F)

105C (221F)

8.........

6.........

4.........

2.........

1.........

1/0.........

2/0.........

3/0.........

4/0.........

250.........

350.........

500.........

750.........

1000.........

1250.........

1500.........

1750.........

2000.........

108.........

139.........

180.........

231.........

261.........

297.........

337.........

384.........

434.........

472.........

569.........

690.........

847.........

980.........

1083.........

1176.........

1257.........

1325.........

110...

140...

180...

230...

260...

295...

335...

385...

435...

470...

570...

690...

845...

980...

1085...

1175...

1255...

1325...

.115...

150...

195...

250...

280...

320...

365...

415...

465...

510...

615...

745...

910...

1055...

1165...

1265...

1355...

1430...

...

130...

170...

210...

240...

275...

310...

355...

405...

440...

535...

650...

805...

930...

1035...

1125...

1200...

1265...

...

140...

180...

225...

260...

295...

335...

380...

435...

475...

575...

700...

865...

1005...

1115...

1210...

1295...

1365...





90 C (194F)

90 C (194F)

105C (221F)

90 C (194F)

105C (221F)

84.........

108.........

140.........

180.........

203.........

231.........

263.........

299.........

338.........

368.........

444.........

540.........

667.........

778.........

868.........

952.........

1027.........

1094.........

85...

110...

140...

180...

205...

230...

265...

300...

340...

370...

445...

540...

665...

780...

870...

950...

1025...

1095...

90...

115...

150...

195...

220...

250...

285...

320...

365...

395...

480...

580...

720...

840...

935...

1025...

1105...

1180...

.......

110...

130...

165...

185...

215...

245...

275...

315...

345...

415...

510...

635...

740...

830...

910...

980...

1045...

...

110...

140...

175...

200...

230...

260...

295...

340...

370...

450...

545...

680...

795...

895...

980...

1060...

1130...

Single conductor cable direct burial

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1/C group buried 36 deep with cables laid on 7-1/2 centers, second circuit similarly spaced. Groups separated 24", open circuited shield operation, i.e. shields bonded and grounded at one point only.Earth ambient temperature 20C Earth thermal resistivity RHO 90 100% load factor

Two circuits six cables

one conductor Copper - direct burial one conductor Aluminum - direct burial

Conductor Size AWG-kcmil





90 C (194F)

90 C (194F)

105C (221F)

90 C (194F)

105C (221F)

8.........

6.........

4.........

2.........

1.........

1/0.........

2/0.........

3/0.........

4/0.........

250.........

350.........

500.........

750.........

1000.........

1250.........

1500.........

1750.........

2000.........

101.........

130.........

167.........

214.........

241.........

275.........

311.........

354.........

399.........

435.........

522.........

631.........

773.........

892.........

985.........

1068.........

1140.........

1200.........

100...

130...

165...

215...

240...

275...

310...

355...

400...

435...

520...

630...

775...

890...

985...

1070...

1140...

1200...

.110...

140...

180...

230...

260...

295...

335...

380...

430...

470...

560...

680...

835...

960...

1060...

1150...

1230...

1295...

...

120...

160...

195...

225...

255...

290...

330...

375...

410...

495...

600...

740...

855...

945...

1025...

1095...

1150...

...

130...

170...

210...

240...

275...

315...

355...

405...

440...

530...

645...

795...

920...

1020...

1105...

1180...

1240...





90 C (194F)

90 C (194F)

105C (221F)

90 C (194F)

105C (221F)

79.........

101.........

130.........

167.........

188.........

214.........

243.........

276.........

311.........

339.........

408.........

494.........

609.........

708.........

790.........

865.........

932.........

991.........

80...

100...

130...

165...

190...

215...

245...

275...

310...

340...

410...

495...

610...

710...

790...

865...

930...

990...

85...

110...

140...

180...

200...

230...

260...

295...

335...

365...

440...

530...

655...

765...

851...

930...

1005...

1070...

...

95...

125...

155...

175...

200...

225...

255...

290...

320...

385...

470...

580...

680...

760...

830...

895...

950...

...

100...

130...

165...

190...

215...

245...

275...

315...

345...

415...

505...

625...

730...

820...

895...

965...

1025...

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okonite ampacity tables_ single conductor electrical cable underground direc

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