---
kind: "section"
citation: "30 C.F.R. § 77.400"
title: "30"
number: "77.400"
heading: "Mechanical equipment guards."
url: "https://uscodex.org/cfr/30/77.400"
---

# §77.400. Mechanical equipment guards.

- (a) Gears; sprockets; chains; drive, head, tail, and takeup pulleys; flywheels; couplings; shafts; sawblades; fan inlets; and similar exposed moving machine parts which may be contacted by persons, and which may cause injury to persons shall be guarded.
- (b) Overhead belts shall be guarded if the whipping action from a broken line would be hazardous to persons below.
- (c) Guards at conveyor-drive, conveyor-head, and conveyor-tail pulleys shall extend a distance sufficient to prevent a person from reaching behind the guard and becoming caught between the belt and the pulley.
- (d) Except when testing the machinery, guards shall be securely in place while machinery is being operated.

## Notes

### Authority

Authority: 30 U.S.C. 811.

### Source

Source: 36 FR 9364, May 22, 1971, unless otherwise noted.