46 C.F.R. § 154.1015 Lighting in gas-dangerous space.
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(a) Each gas-dangerous space that has lighting fixtures must have at least two branch circuits for lighting. (b) Each switch and each overcurrent protective device for any lighting circuit that is in a gas-dangerous space must open each conductor of the circuit simultaneously. (c) Each switch and each overcurrent protective device for lighting in a gas-dangerous space must be in a gas-safe space.
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PART 154—SAFETY STANDARDS FOR SELF-PROPELLED VESSELS CARRYING BULK LIQUEFIED GASES
Subpart C—Design, Construction and Equipment
Electrical
§ 154.1015 Lighting in gas-dangerous space.

