30 CFR Part 57Public Domain

§ 57.14132 — Horns and backup alarms for surface equipment

Subpart M — Machinery and Equipment

(a)Manually-operated horns or other audible warning devices provided on self-propelled mobile equipment as a safety device shall be maintained in a functional condition. (b)(1) When the operator has an obstructed view to the rear, self-propelled mobile equipment shall have—

(i)An automatic reverse-activated signal alarm;

(ii)A wheel-mounted bell alarm which sounds at least once for each three feet of reverse movement;

(iii)A discriminating backup alarm that covers the area of obstructed view; or

(iv)An observer to signal when it is safe to back up.

(2)Alarms shall be audible above the surrounding noise level.

(3)An automatic reverse-activated strobe light may be used at night in lieu of an audible reverse alarm.

(c)This standard does not apply to rail equipment.

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Public Domain: 30 CFR Part 57 (MSHA Safety and Health Standards — Underground Metal and Nonmetal Mines) is a U.S. government publication and is not subject to copyright. Text extracted from the official source ↗. Figures are served from the eCFR; if one does not load, use the link in its place.