okonite wire and cable - 3 conductor cable direct burial
Ampacity Tables
Three Conductor
Underground Direct Burial

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Single conductor cable direct burial

Three conductor cable
direct burial

Cables buried 36” deep. For two cables, currents based on cables being laid on 24” centers.

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

 

One circuit — one cable
Three conductor
Copper - direct burial		 Three conductor
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........\

83.........
106.........
137.........
178.........
201.........
229.........
260.........
297.........
335.........
367.........
442.........
531.........
648.........
729.........

85...
105...
135...
180...
200...
230...
260...
295...
335...
365...
440...
530...
650...
730...

89...
115...
150...
190...
215...
245...
280...
320...
360...
395...
475...
570...
700...
785...

—...
115...
145...
185...
210...
240...
270...
305...
350...
380...
460...
550...
665...
750...

—...
120...
155...
200...
225...
255...
290...
330...
375...
410...
495...
590...
720...
810...

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)

65.........
82.........
107.........
138.........
156.........
178.........
203.........
231.........
262.........
287.........
347.........
420.........
522.........
602.........

65...
80...
105...
140...
155...
180...
205...
230...
260...
285...
345...
420...
520...
600...

70...
88...
115...
150...
170...
190...
220...
250...
280...
310...
375...
450...
560...
650...

—...
90...
115...
145...
165...
185...
210...
240...
270...
300...
360...
435...
540...
620...

—...
95...
125...
155...
175...
200...
225...
260...
295...
320...
390...
470...
580...
665...

 

Two circuits — two cables
Three conductor
Copper - direct burial		 Three conductor
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........\

78.........
99.........
129.........
166.........
187.........
213.........
242.........
275.........
311.........
340.........
408.........
488.........
593.........
666.........

80...
100...
130...
165...
185...
215...
240...
275...
310...
340...
410...
490...
595...
665...

84...
105...
140...
180...
200...
230...
260...
295...
335...
365...
440...
525...
640...
715...

—...
105...
135...
170...
195...
220...
250...
280...
320...
350...
420...
500...
605...
675...

—...
115...
145...
185...
210...
235...
270...
305...
345...
375...
450...
535...
650...
730...

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)

61.........
77.........
100.........
129.........
146.........
166.........
189.........
215.........
243.........
266.........
320.........
386.........
478.........
550.........

60...
75...
100...
130...
145...
165...
190...
215...
245...
265...
320...
385...
480...
550...

66...
83...
110...
140...
155...
180...
205...
230...
260...
285...
345...
415...
515...
590...

—...
80...
105...
135...
150...
170...
195...
220...
250...
275...
330...
395...
485...
560...

—...
88...
115...
145...
165...
185...
210...
240...
270...
295...
355...
425...
525...
600...

 

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