(a)Each direct current ship's service switchboard must have the equipment required by paragraphs (b) through (f) of this section.
(b)For each connected generator, each switchboard must have the following:
(1)A circuit breaker that meets § 111.12-11 and § 111.50-5.
(2)A disconnect switch or link for each generator conductor, except a switchboard having a draw-out or plug-in type generator circuit breaker that disconnects—
(i)Each conductor; or
(ii)If there is a switch in the generator neutral, each ungrounded conductor.
(3)A field rheostat.
(4)An indicator light connected between the generator and circuit breaker.
(c)For each two-wire generator, each switchboard must have:
(1)An ammeter; and
(2)A voltmeter with a selector switch that connects the voltmeter to show:
(i)Generator voltage; and
(ii)Bus voltage.
(d)For each three-wire generator, each switchboard must have the following:
(1)An ammeter for:
(i)The positive lead; and
(ii)The negative lead.
(2)A center zero type ammeter for the neutral ground connection.
(3)A voltmeter with a selector switch that connects the voltmeter to show generator and bus voltage:
(i)Positive to negative;
(ii)Positive to neutral; and
(iii)Neutral to negative.
(e)Each switchboard must have ground detection that meets subpart 111.05 for the:
(1)Main power system;
(2)Main lighting system; and
(3)Emergency lighting system.
(f)For each shore power connection, each switchboard must have:
(1)A circuit breaker or fused switch; and
(2)A pilot light connected to the shore side.
(g)One of the voltmeters under paragraph (c)(2) or (d)(3) of this section must be connected to show:
(1)For each two-wire system, shore connection voltage; and
(2)For each three-wire system, shore connection voltage:
(i)Positive to negative;
(ii)Positive to neutral; and
(iii)Neutral to negative. [CGD 74-125A, 47 FR 15236, Apr. 8, 1982, as amended by USCG-2020-0075, 88 FR 16361, Mar. 16, 2023]