46 CFR § 129.520 - Hazardous areas.
---
identifier: "/us/cfr/t46/s129.520"
source: "ecfr"
legal_status: "authoritative_unofficial"
title: "46 CFR § 129.520 - Hazardous areas."
title_number: 46
title_name: "Shipping"
section_number: "129.520"
section_name: "Hazardous areas."
chapter_name: "COAST GUARD, DEPARTMENT OF HOMELAND SECURITY"
subchapter_number: "L"
subchapter_name: "OFFSHORE SUPPLY VESSELS"
part_number: "129"
part_name: "ELECTRICAL INSTALLATIONS"
positive_law: false
currency: "2026-03-24"
last_updated: "2026-03-24"
format_version: "1.1.0"
generator: "[email protected]"
authority: "46 U.S.C. 3306; sec. 617, Pub. L. 111-281, 124 Stat. 2905; Department of Homeland Security Delegation No. 0170.1."
regulatory_source: "CGD 82-004 and CGD 86-074, 62 FR 49332, Sept. 19, 1997, unless otherwise noted."
cfr_part: "129"
---
# 129.520 Hazardous areas.
(a) No OSV that carries flammable or combustible liquid with a flashpoint of below 140 °F (60 °C), or carries hazardous cargoes on deck or in integral tanks, or is involved in servicing wells, may have electrical equipment installed in pump rooms, in hose-storage spaces, or within 3 meters (10 feet) of a source of vapor on a weather deck unless the equipment is explosion-proof or intrinsically safe under § 111.105-9 or 111.105-11 of this chapter.
(b) No electrical equipment may be installed in any locker used to store paint, oil, turpentine, or other flammable liquid unless the equipment is explosion-proof or intrinsically safe under § 111.105-9 or § 111.105-11 of this chapter.
(c) Equipment that is explosion-proof and intrinsically safe must comply with subpart 111.105 of this chapter.