[Code of Federal Regulations]
[Title 46, Volume 4]
[Revised as of October 1, 2002]
From the U.S. Government Printing Office via GPO Access
[CITE: 46CFR111.30-25]

[Page 226-227]
 
                           TITLE 46--SHIPPING
 
    CHAPTER I--COAST GUARD, DEPARTMENT OF TRANSPORTATION (CONTINUED)
 
PART 111--ELECTRIC SYSTEMS--GENERAL REQUIREMENTS--Table of Contents
 
                      Subpart 111.30--Switchboards
 
Sec. 111.30-25  Alternating-current ship's service switchboards.

    (a) Except as allowed in paragraph (g) of this section, each 
alternating-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 Sec. 111.12-11 and Sec. 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 generator conductor; or
    (ii) If there is a switch in the generator neutral, each ungrounded 
conductor.
    (3) A pilot lamp connected between the generator and the circuit 
breaker.
    (4) An ammeter with a selector switch that connects the ammeter to 
show the current in each phase.
    (5) A voltmeter with a selector switch that connects the voltmeter 
to show the:
    (i) Generator voltage of each phase; and
    (ii) Bus voltage of one phase.
    (6) A voltage regulator and voltage regulator functional cut-out 
switch.
    (c) For each generator that is not excited from a variable voltage 
or rotary amplifier that is controlled by a voltage regulator unit 
acting on the exciter field, each switchboard must have:
    (1) A generator field rheostat;
    (2) A double-pole field switch;
    (3) Discharge clips; and
    (4) A discharge resistor.
    (d) If generators are arranged for parallel operation, each 
switchboard must have:
    (1) A speed control for the prime mover of each generator;
    (2) An indicating wattmeter for each generator; and
    (3) A synchroscope and synchronizing lamp that have a selector 
switch to show synchronization for paralleling generators.
    (e) Each switchboard must have the following:
    (1) Ground detection that meets Subpart 111.05 for the:
    (i) Ship's service power system;
    (ii) Normal lighting system; and
    (iii) Emergency lighting system.
    (2) A frequency meter with a selector switch to connect the meter to 
each generator.
    (3) An exciter field rheostat.
    (f) For each shore power connection each switchboard must have:
    (1) A circuit breaker or fused switch;

[[Page 227]]

    (2) A pilot light connected to the shore side of the circuit breaker 
or fused switch; and
    (3) One of the voltmeters under paragraph (b)(5) of this section 
connected to show the voltage of each phase of the shore power 
connection.
    (g) The equipment under paragraphs (b), (d), (e), and (f) of this 
section, except the equipment under paragraphs (b)(1), (b)(2), and 
(f)(1), must be on the ship's service switchboard or on a central 
control console that:
    (1) Is in the same control area as the main ship's service 
switchboard or can remotely control the ship's service generator circuit 
breaker;
    (2) Has a generator section that has only generator functions;
    (3) Has the generator section segregated from each other console 
section by a fire-resistant barrier; and
    (4) Has cabling from the main switchboard to the generator section 
of the console that:
    (i) Has only generator control and generator instrumentation 
circuits; and
    (ii) Is protected from mechanical damage.