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e-CFR data is current as of December 3, 2020

Title 46Chapter ISubchapter JPart 111Subpart 111.05 → §111.05-31


Title 46: Shipping
PART 111—ELECTRIC SYSTEMS—GENERAL REQUIREMENTS
Subpart 111.05—Equipment Ground, Ground Detection, and Grounded Systems


§111.05-31   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 (8.4mm2).

(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

Size of the largest generator cable or equivalent for parallel generators—AWG-MCM (mm2)Size of the system grounding conductor—AWG(mm2)
Greater thanLess than or equal to
2 (33.6)8 (8.4)
2 (33.6)0 (53.5)6 (13.3)
0 (53.5)3/0 (85.0)4 (21.2)
3/0 (85.0)350 MCM (177)2 (33.6)
350 MCM (177)600 MCM (304)0 (53.5)
600 MCM (304)1100 MCM (557)2/0 (67.5)
1100 MCM (557)   3/0 (85.0)

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