Regulations last checked for updates: Apr 30, 2025

Title 46 - Shipping last revised: Mar 17, 2025
§ 111.15-25 - Overload and reverse current protection.

(a) An overload protective device must be in each battery conductor, except conductors of engine cranking batteries and batteries with a nominal potential of 6 volts or less. For large storage battery installations, the overcurrent protective devices must be next to, but outside of, the battery room.

(b) Except when a converter is used, the charging equipment for all batteries with a nominal voltage more than 20 percent of line voltage must protect automatically against reversal of current.

[CGD 74-125A, 47 FR 15236, Apr. 8, 1982, as amended by USCG-2020-0075, 88 FR 16361, Mar. 16, 2023]
authority: 46 U.S.C. 3306,3703; DHS Delegation No. 00170.1, Revision No. 01.2. Section 111.05-20 and Subpart 111.106 also issued under sec. 617, Pub. L. 111-281, 124 Stat. 2905
source: CGD 74-125A, 47 FR 15236, Apr. 8, 1982, unless otherwise noted.
cite as: 46 CFR 111.15-25