---
kind: "section"
citation: "46 C.F.R. § 112.50-1"
title: "46"
number: "112.50-1"
heading: "General."
url: "https://uscodex.org/cfr/46/112.50-1"
---

# §112.50-1. General.

- (a) The prime mover of a generator set must have:
  - (1) All accessories necessary for operation and protection of the prime mover; and
  - (2) A self-contained cooling system of a size that ensures continuous operation with 100 degrees F (37 degrees C) air.
- (b) The fuel used must have a flashpoint of not less than 110 degrees F (43 degrees C).
- (c) The room that has the generator set must have intake and exhaust ducts to supply adequate cooling air.
- (d) The generator set must be capable of carrying its full rated load within 45 seconds after cranking is started with the intake air, room ambient temperature, and starting equipment at O°C. The generator's prime mover must not have a starting aid to meet this requirement, except that a thermostatically-controlled electric water-jacket heater connected to the final emergency bus is permitted.
- (e) The generator set must start by hydraulic, compressed air, or electrical means.
- (f) The generator set must maintain proper lubrication when inclined to the angles specified in [§ 112.05-5(c)](/cfr/46/112.05-5.md?p=c), and must be arranged so that it does not spill oil under a vessel roll of 30 degrees to each side of the vertical.
- (g) **The following automatic shutdowns are required for the generator set—**
  - (1) Overspeed; and
  - (2) **Operation of a fixed fire extinguishing system in the emergency generator room.**
- (h) **The following audible alarms are required for the generator set if the prime mover is a diesel engine—**
  - (1) Low oil pressure; and
  - (2) **High cooling water temperature.**
- (i) If the prime mover is a gas turbine, it must meet the shutdown and alarm requirements in [§ 58.10-15(f)](/cfr/46/58.10-15.md?p=f) of this chapter.
- (j) An independent fuel supply must be provided for the prime mover.
- (k) Each emergency generator that is arranged to be automatically started must be equipped with a starting device with an energy-storage capability of at least six consecutive starts. A second, separate source of starting energy may provide three of the required six starts. If a second source is provided, the system need only provide three consecutive starts.

## Notes

### Amendments

[CGD 74-125A, 47 FR 15267, Apr. 8, 1982, as amended by CGD 94-108, 61 FR 28287, June 4, 1996; USCG-2004-18884, 69 FR 58348, Sept. 30, 2004; USCG-2020-0075, 88 FR 16369, Mar. 16, 2023]

### Authority

Authority: 46 U.S.C. 3306, 3703; DHS Delegation No. 00170.1, Revision No. 01.2.

### Source

Source: CGD 74-125A, 47 FR 15267, Apr. 8, 1982, unless otherwise noted.

### Amendments

[CGD 74-125A, 47 FR 15267, Apr. 8, 1982, as amended by CGD 94-108, 61 FR 28287, June 4, 1996; USCG-2004-18884, 69 FR 58348, Sept. 30, 2004; USCG-2020-0075, 88 FR 16369, Mar. 16, 2023]