-31 -31 Grounding conductors for systems

The exact 46 CFR §111.05-31 text, rendered cleanly with its subsection structure — plus how this rule shows up on the exam.

Public-domain federal text · ingested from eCFR

Every answer cited & verifiedAll 4 USCG exam modulesReviewed by a former NMC exam writer

TL;DR

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

Section 111.05-31 — full text

Rendered cleanly from the source — the exact regulatory text, with subsection structure preserved.

(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).

(b)A conductor for grounding the neutral of an alternating-current system must meet Table 111.05-31(b). Table 111.05-31()—Neutral Grounding Conductor for Alternating-Current System Size of the largest generator cable or equivalent for parallel generators—AWG-MCM (mm) | Size of the system grounding conductor—AWG(mm) Greater than | Less 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)

From regulation to exam

See how this section shows up on the test

Test your knowledge

Try 5 real exam questions on the rules behind this regulation — no sign-up needed.

Try 5 free questions Sign up free

Was this page helpful?

Start drilling in 30 seconds. Free.

No signup, no credit card — answer 5 real, cited exam questions right now.

Try 5 free questions See how it works

46 CFR §111.05-31 — -31 -31 Grounding conductors for systems · CaptainsGround