Okonite Ampacity Tables: Single Conductor or Triplexed Cables in Conduit

Ampacity Tables
Single Conductor or Triplexed In Conduit

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3 single conductor cables in conduit in air

Three single conductor
cables in conduit — in air

Closed shield operation. Shields bonded and grounded at multiple points. Any load factor from 30 to 100%. One triplexed cable or three single conductor cables in conduit.

The load ratings are for a single, loaded cable in still air. In a group of loaded cables in close proximity in air, exposed or enclosed, follow the correction method shown on the ampacity correction factors page.

Air ambient temperature 40°C.

One isolated conduit — three single
or triplexed conductors — in air

Copper

Conductor Size AWG-kcmil	Non-Shielded	Shielded
	600-5000 Volts Ampacity	2001-5000 Volts Ampacity		5001-35,000 Volts Ampacity
	90° C (194°F)	90° C (194°F)	105°C (221°F)	90° C (194°F)	105°C (221°F)
8......... 6......... 4......... 2......... 1......... 1/0......... 2/0......... 3/0......... 4/0......... 250......... 350......... 500......... 750......... 1000........\	55......... 75......... 97......... 130......... 156......... 179......... 204......... 242......... 278......... 317......... 384......... 477......... 598......... 689.........	55... 75... 97... 130... 155... 180... 205... 240... 280... 315... 385... 475... 600... 690...	61... 84... 110... 145... 175... 200... 225... 270... 305... 355... 430... 530... 665... 770...	—... 83... 110... 150... 170... 195... 225... 260... 295... 330... 395... 480... 585... 675...	—... 93... 120... 165... 190... 215... 255... 290... 330... 365... 440... 535... 655... 755...

Aluminum

Conductor Size AWG-kcmil	Non-Shielded	Shielded
	600-5000 Volts Ampacity	2001-5000 Volts Ampacity		5001-35,000 Volts Ampacity
	90° C (194°F)	90° C (194°F)	105°C (221°F)	90° C (194°F)	105°C (221°F)
8......... 6......... 4......... 2......... 1......... 1/0......... 2/0......... 3/0......... 4/0......... 250......... 350......... 500......... 750......... 1000.........	43......... 58......... 76......... 102......... 122......... 139......... 159......... 189......... 217......... 249......... 303......... 381......... 488......... 578.........	43... 58... 76... 100... 120... 140... 160... 190... 215... 250... 305... 380... 490... 580...	48... 65... 85... 115... 135... 155... 175... 210... 240... 280... 340... 425... 545... 645...	—... 65... 84... 115... 130... 150... 175... 200... 230... 255... 310... 385... 485... 565...	—... 72... 94... 130... 150... 170... 200... 225... 260... 290... 350... 430... 540... 640...

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