§ 111.05-31 — -31 Grounding Conductors For Systems

(a) A conductor for grounding a direct-current system must be the larger of:

(1) The largest conductor supplying the system; or

(2) No. 8 AWG (8.4mm

2).

(b) A conductor for grounding the neutral of an alternating-current system must meet Table 111.05-31(b).

Table 111.05-31(b)—Neutral Grounding Conductor for Alternating-Current System