Regulations last checked for updates: May 03, 2025

Title 46 - Shipping last revised: Mar 17, 2025
§ 78.47-10 - Manual alarm boxes.

(a) In all new installations, manual alarm boxes shall be clearly and permanently marked “IN CASE OF FIRE BREAK GLASS.” Existing boxes not so marked with the same or equivalent wording, shall be identified either on the box or adjacent bulkhead in at least 1/2 inch letters “IN CASE OF FIRE BREAK GLASS.” All manual alarm boxes shall be numbered in red on the adjacent bulkhead with at least 1/2 inch figures. The number shall agree with the number of the zone.

(b) [Reserved]

authority: 33 U.S.C. 1321(j); 46 U.S.C. 2103,3306,6101; 49 U.S.C. 5103,5106; E.O. 12234, 45 FR 58801, 3 CFR, 1980 Comp., p. 277; E.O. 12777, 56 FR 54757, 3 CFR, 1991 Comp., p. 351; Department of Homeland Security Delegation No. 0170.1
source: CGFR 65-50, 30 FR 16955, Dec. 30, 1965, unless otherwise noted.
cite as: 46 CFR 78.47-10