Okonite Ampacity Tables: Triplexed Conductor Cable Underground Direct Burial

Ampacity Tables
Triplexed Conductor
Underground Direct Burial

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Triplexed cable direct burial

Triplexed cable
direct burial

Triplexed cables or three single conductors buried 36” deep and separated by 24”. Shields bonded and grounded at multiple points.

Earth ambient temperature 20°C
Earth thermal resistivity RHO 90
100% load factor

One circuit

Three single or triplexed conductors
Copper - direct burial

Three single or triplexed conductors
Aluminum - direct burial

Conductor Size AWG-kcmil	Non-Shielded	Shielded
	600-2000 Volts Ampacity	2001-5000 Volts Ampacity		5001-35000 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........\	92......... 118......... 153......... 197......... 223......... 255......... 289......... 329......... 373......... 408......... 490......... 592......... 724......... 825.........	90... 120... 150... 195... 225... 255... 290... 330... 375... 410... 490... 590... 725... 825...	100... 125... 165... 210... 240... 275... 310... 355... 400... 440... 530... 640... 780... 890...	—... 115... 150... 190... 215... 245... 275... 315... 360... 390... 470... 565... 685... 770...	—... 125... 160... 200... 230... 265... 300... 340... 385... 420... 505... 605... 735... 830...

Non-Shielded	Shielded
600-2000 Volts Ampacity	2001-5000 Volts Ampacity		5001-35000 Volts Ampacity
90° C (194°F)	90° C (194°F)	105°C (221°F)	90° C (194°F)	105°C (221°F)
72......... 92......... 119......... 153......... 174......... 198......... 226......... 257......... 291......... 319......... 385......... 467......... 579......... 672.........	70... 90... 120... 155... 175... 200... 225... 255... 290... 320... 385... 465... 580... 670...	80... 100... 130... 165... 185... 215... 245... 275... 315... 345... 415... 505... 625... 725...	—... 90... 115... 145... 165... 190... 215... 245... 280... 305... 370... 445... 550... 635...	—... 100... 125... 160... 180... 205... 235... 265... 300... 330... 400... 480... 595... 685...

Two circuits

Three single or triplexed conductors
Copper - direct burial

Three single or triplexed conductors
Aluminum - direct burial

Conductor Size AWG-kcmil	Non-Shielded	Shielded
	600-2000 Volts Ampacity	2001-5000 Volts Ampacity		5001-35000 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........\	85......... 109......... 141......... 181......... 205......... 233......... 264......... 300......... 339......... 370......... 444......... 534......... 649......... 738.........	85... 110... 140... 180... 205... 235... 265... 300... 340... 370... 445... 535... 650... 740...	90... 115... 150... 195... 220... 250... 285... 325... 365... 400... 480... 575... 700... 795...	—... 105... 140... 175... 200... 225... 255... 290... 325... 355... 425... 510... 615... 690...	—... 115... 150... 185... 215... 240... 275... 310... 350... 385... 460... 550... 660... 740...

Non-Shielded	Shielded
600-2000 Volts Ampacity	2001-5000 Volts Ampacity		5001-35000 Volts Ampacity
90° C (194°F)	90° C (194°F)	105°C (221°F)	90° C (194°F)	105°C (221°F)
67......... 85......... 110......... 141......... 160......... 182......... 206......... 234......... 265......... 289......... 348......... 421......... 520......... 601.........	65... 85... 110... 140... 160... 180... 205... 235... 265... 290... 350... 420... 520... 600...	70... 90... 120... 150... 170... 195... 220... 250... 285... 310... 375... 455... 560... 645...	—... 85... 105... 135... 155... 175... 200... 225... 255... 280... 335... 405... 485... 565...	—... 90... 115... 145... 165... 190... 215... 240... 275... 300... 360... 435... 535... 610...

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