okonite wire and cable - single conductor underground direct burial
Ampacity Tables
Single Conductor
Underground Direct Burial

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single conductor cable direct burial

Single conductor cable
direct burial

1/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 20°C
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

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.........
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...

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)

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

Single conductor cable
direct burial

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 20°C
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

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.........
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...

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)

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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