---
kind: "section"
citation: "46 C.F.R. § 112.50-7"
title: "46"
number: "112.50-7"
heading: "Compressed air starting."
url: "https://uscodex.org/cfr/46/112.50-7"
---

# §112.50-7. Compressed air starting.


A compressed air starting system must meet the following:

- (a) The starting, charging, and energy storing devices must be in the emergency generator room, except for the main or auxiliary air compressors addressed in [paragraph (c)(3)(i)](#c-3-i) of this section.
- (b) The compressed air starting system must provide the cranking torque and engine starting RPM recommended by the engine manufacturer.
- (c) The compressed air starting system must have an air receiver that meets the following:
  - (1) **Has a capacity for at least six consecutive starts.** A second, separate source of starting energy may provide three of the required consecutive starts. If a second source is provided, the compressed air starting system need only provide three consecutive starts.
  - (2) **Supplies no other system.**
  - (3) **Is supplied from one of the following—**
    - (i) The main or auxiliary compressed air receivers with a nonreturn valve in the emergency generator room and a handcranked, diesel-powered air compressor for recharging the air receiver.
    - (ii) An electrically driven air compressor that is automatically operated and is powered from the emergency power source. If this compressor supplies other auxiliaries, there must be a non-return valve at the inlet of the starting air receiver and there must be a handcranked, diesel-powered air compressor for recharging the air receiver.

## Notes

### Amendments

[CGD 74-125A, 47 FR 15267, Apr. 8, 1982, as amended by CGD 94-108, 61 FR 28288, June 4, 1996]

### 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 28288, June 4, 1996]