[Code of Federal Regulations]

[Title 46, Volume 4]

[Revised as of October 1, 2006]

From the U.S. Government Printing Office via GPO Access

[CITE: 46CFR111.30-27]



[Page 225]

 

                            TITLE 46_SHIPPING



                  (This book contains parts 90 to 139)

 

   CHAPTER I--COAST GUARD, DEPARTMENT OF HOMELAND SECURITY (CONTINUED)

 

PART 111_ELECTRIC SYSTEMS_GENERAL REQUIREMENTS--Table of Contents

 

                       Subpart 111.30_Switchboards

 

Sec.  111.30-27  Direct current ship's service switchboards.



    (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 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 conductor; or

    (ii) If there is a switch in the generator neutral, each ungrounded 

conductor.

    (3) A field rheostat.

    (4) A pilot lamp 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.