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Table 250.122 Minimum Size Equipment Grounding Conductor
for Grounding Raceway and Equipment |
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Rating or Setting of automatic Overcurrent Device in
Circuit Ahead of Equipment, Conduit, etc., Not Exceeding
(Amperes) |
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Size (AWG or kcmil) |
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Copper |
Aluminum or Copper-Clad Aluminum* |
|
15 |
14 |
12 |
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20 |
12 |
10 |
|
30 |
10 |
8 |
|
40 |
10 |
8 |
|
60 |
10 |
8 |
|
100 |
8 |
6 |
|
200 |
6 |
4 |
|
300 |
4 |
2 |
|
400 |
3 |
1 |
|
500 |
2 |
1/0 |
|
600 |
1 |
2/0 |
|
800 |
1/0 |
3/0 |
|
1000 |
2/0 |
4/0 |
|
1200 |
3/0 |
250 |
|
1600 |
4/0 |
350 |
|
2000 |
250 |
400 |
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2500 |
350 |
600 |
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3000 |
400 |
600 |
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4000 |
500 |
800 |
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5000 |
700 |
1200 |
|
6000 |
800 |
1200 |
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Note: Where necessary to comply with 250.4(A)(5) or
(B)(4), the equipment grounding conductor shall be sized
larger than given in the table |
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*See installation restrictions in 250.120 |
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Notice: |
NEC is a registered
trademark of the National Fire Protection Association, Inc.
All NEC references by Electrical Helper are interpretations of the NEC
by the Electrical Helper staff and are not NEC statements. The official
position of the NEC requires that the NEC be referred to in its
entirety. |
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