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Size
Rating or setting of
automatic overcurrent Aluminum or
device in circuit Copper Copper-Clad
ahead of equipment Wire No. Aluminum
conduit, etc., not Wire No.*
exceeding (amperes)
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 kcmil
1600 4/0 350 kcmil
2000 250 kcmil 400 kcmil
2500 350 kcmil 600 kcmil
3000 400 kcmil 600 kcmil
4000 500 kcmil 800 kcmil
5000 700 kcmil 1200 kcmil
6000 800 kcmil 1200 kcmil
*See installation restrictions in Section 250.122
Minimum Size Equipment Grounding
Conductors for Grounding Raceway
& Equipment
Table 9-8