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Answer :
Final answer:
In corrosive environments, the wiring method for the branch-circuit wiring on the supply side of junction boxes connected to conduits that run to underwater luminaires should be either Rigid Metal Conduit or Intermediate Metal Conduit, or Liquidtight Flexible Nonmetallic Conduit and PVC conduit.
Explanation:
According to the National Electrical Code (NEC), when branch-circuit wiring is installed on the supply side of enclosures and junction boxes connected to conduits that run to underwater luminaires in corrosive environments as described in 680.14, the wiring method used for that portion of the circuit should be either RMC (Rigid Metal Conduit) or IMC (Intermediate Metal Conduit), or LFNC (Liquidtight Flexible Nonmetallic Conduit) and PVC (Polyvinyl Chloride) conduit. This is expressed as option (a) or option (b).
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