Unfortunately NVIC 2-89 confuses the cable vs. wire issue by stating wire in conduit may be accepted if certain conditions are met. To date use of wire has only been accepted for the three applications noted below. This does not include wire inside of conduit. Conduit is not an enclosure. Wiring in conduit on the deck of a barge.
Cable is a factory assembly of two or more conductors having an overall covering or jacket.
Wire is one or more conductors without an overall covering. Both the Code of Federal Regulations and IEEE Standard 45 require power distribution and control circuits to be made using cable. The additional protection offered by the jacket makes cable much better suited for the marine, shipboard environment. The conductors' insulation is better protected during installation and in service. The wire used aboard certificated vessels must meet the requirements of 46 CFR 111.60-11.