---
kind: "section"
citation: "46 C.F.R. § 111.30-29"
title: "46"
number: "111.30-29"
heading: "Emergency switchboards."
url: "https://uscodex.org/cfr/46/111.30-29"
---

# §111.30-29. Emergency switchboards.

- (a) Each emergency generator must have an emergency switchboard.
- (b) There must be a test switch at the emergency switchboard to simulate a failure of the normal power source and cause the emergency loads to be supplied from the emergency power source.
- (c) The emergency switchboard must be as near as practicable to the emergency power source but not in the same space as a battery emergency power source.
- (d) Each switchboard of an alternating-current emergency generator must have:
  - (1) A circuit breaker that meets [§ 111.12-11](/cfr/46/111.12-11.md);
  - (2) A disconnect switch or link for each emergency generator conductor, except for a switchboard with a draw out or plug-in type generator circuit breaker that disconnects:
    - (i) Each generator conductor; and
    - (ii) If there is a switch in the generator neutral, each ungrounded conductor; and
  - (3) **An indicator light connected between the generator and circuit breaker.**
- (e) For each emergency generator that is not excited from a variable voltage or rotary amplifier exciter that is controlled by a voltage regulator unit acting on the exciter field, each emergency switchboard must have:
  - (1) A generator field rheostat;
  - (2) A double pole field switch;
  - (3) Discharge clips; and
  - (4) **A discharge resistor.**
- (f) Each emergency switchboard must have the following:
  - (1) **An ammeter with a selector switch that connects the ammeter to show the current for each phase.**
  - (2) **A voltmeter with a selector switch that connects the voltmeter to show—**
    - (i) Generator voltage of each phase; and
    - (ii) **Bus voltage of one phase.**
  - (3) Ground detection that meets [subpart 111.05](/cfr/46/subpart111.05.md) for the emergency lighting system.
  - (4) **A frequency meter.**
  - (5) **An exciter field rheostat.**
  - (6) **A voltage regulator and a voltage regulator functional cut-out switch.**
- (g) Each direct-current emergency switchboard must have the:
  - (1) Equipment under [§ 111.30-27 (b) through (d)](/cfr/46/111.30-27.md?p=b..d); and
  - (2) Ground detection under [subpart 111.05](/cfr/46/subpart111.05.md) for the emergency lighting system.

## Notes

### Amendments

[CGD 74-125A, 47 FR 15236, Apr. 8, 1982, as amended by CGD 94-108, 61 FR 28279, June 4, 1996; USCG-2020-0075, 88 FR 16361, Mar. 16, 2023]

### Authority

Authority: 46 U.S.C. 3306, 3703; DHS Delegation No. 00170.1, Revision No. 01.2. Section 111.05-20 and Subpart 111.106 also issued under sec. 617, Pub. L. 111-281, 124 Stat. 2905.

### Source

Source: CGD 74-125A, 47 FR 15236, Apr. 8, 1982, unless otherwise noted.

### Amendments

[CGD 74-125A, 47 FR 15236, Apr. 8, 1982, as amended by CGD 94-108, 61 FR 28279, June 4, 1996; USCG-2020-0075, 88 FR 16361, Mar. 16, 2023]