---
kind: "section"
citation: "30 C.F.R. § 57.4160"
title: "30"
number: "57.4160"
heading: "Underground electric substations and liquid storage facilities."
url: "https://uscodex.org/cfr/30/57.4160"
---

# §57.4160. Underground electric substations and liquid storage facilities.


The requirements of this standard apply to underground areas only.

- (a) Areas within 25 feet of the following shall be free of combustible materials:
  - (1) **Electric substations.**
  - (2) **Unburied, combustible liquid storage tanks.**
  - (3) **Any group of containers used for storage of more than 60 gallons of combustible liquids.**
- (b) This standard does not apply to installed wiring or timber that is coated with at least one inch of shotcrete, one-half inch of gunite, or other noncombustible materials with equivalent fire protection characteristics.

## Notes

### Authority

Authority: Sec. 101, Federal Mine Safety and Health Act of 1977, Pub. L. 91-173 as amended by Pub. L. 95-164, 91 Stat. 1291 (30 U.S.C. 811).

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 50 FR 4082, Jan. 29, 1985, unless otherwise noted.