Equipment Ground Tables

Rating or Setting of
Automatic Overcurrent
Device in Circuit Ahead
of Equipment, Conduit,
etc., Not Exceeding
(Amperes)
Copper Size
(AWG or kcmil)

Aluminum or
Copper-Clad
Aluminum*

15 14 12
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
2500 350 600
3000 400 600
4000 500 800
5000 700 1200
6000 800 1200

Note: Where necessary to comply with Section 250-2(d), the equipment grounding conductor shall be sized larger than this table.
* See installation restrictions in Section 250-120.

Note: Where necessary to comply with Section 250-2(d), the equipment grounding conductor shall be sized larger than this table.
* See installation restrictions in Section 250-120.