111.105-32—Bulk liquefied flammable gas and ammonia carriers.
(a)
Each vessel that carries bulk liquefied flammable gases or ammonia as a cargo, cargo residue, or vapor must meet the requirements of this section.
(c)
Each submerged cargo pump motor design must receive concept approval by the Commandant (CG-521) and its installation must receive plan approval by the Commanding Officer, Marine Safety Center.
(f)
Electrical equipment must not be installed in a hold space that has a tank that is not required to have a secondary barrier under § 154.459 of this chapter, except:
(g)
Electrical equipment must not be installed in a space that is separated by a gastight steel boundary from a hold space that has a tank that must have a secondary barrier under the requirements of § 154.459 of this chapter, except:
(h)
A cargo-handling room must not have any installed electrical equipment, except explosionproof lighting fixtures.
(i)
A space for cargo hose storage or a space that has cargo piping must not have any installed electrical equipment, except:
(k)
A space, except those named in paragraphs (f) through (i) of this section, that has a direct opening to gas-dangerous spaces or zones must have no electrical equipment except as allowed in the gas-dangerous space or zone.
(l)
Each gas-dangerous space that has lighting fixtures must have at least two branch circuits for lighting.
(m)
Each switch and each overcurrent protective device for any lighting circuit that is in a gas-dangerous space must open all conductors of the circuit simultaneously.
(n)
Each switch and each overcurrent protective device for lighting in a gas-dangerous space must be in a gas-safe space.