---
kind: "section"
citation: "30 C.F.R. § 250.405"
title: "30"
number: "250.405"
heading: "What are the safety requirements for diesel engines used on a drilling rig?"
url: "https://uscodex.org/cfr/30/250.405"
---

# §250.405. What are the safety requirements for diesel engines used on a drilling rig?


You must equip each diesel engine with an air intake device to shut down the diesel engine in the event of a runaway.

- (a) For a diesel engine that is not continuously manned, you must equip the engine with an automatic shutdown device;
- (b) For a diesel engine that is continuously manned, you may equip the engine with either an automatic or remote manual air intake shutdown device;
- (c) You do not have to equip a diesel engine with an air intake device if it meets one of the following criteria:
  - (1) Starts a larger engine;
  - (2) Powers a firewater pump;
  - (3) Powers an emergency generator;
  - (4) Powers a BOP accumulator system;
  - (5) Provides air supply to divers or confined entry personnel;
  - (6) Powers temporary equipment on a nonproducing platform;
  - (7) Powers an escape capsule; or
  - (8) **Powers a portable single-cylinder rig washer.**

## Notes

### Amendments

[76 FR 64462, Oct. 18, 2011, as amended at 81 FR 36149, June 6, 2016]

### Authority

Authority: 30 U.S.C. 1751, 31 U.S.C. 9701, 33 U.S.C. 1321(j)(1)(C), 43 U.S.C. 1334.

### Source

Source: 76 FR 64462, Oct. 18, 2011, unless otherwise noted.

### Amendments

[76 FR 64462, Oct. 18, 2011, as amended at 81 FR 36149, June 6, 2016]