What kind of wire should I use for a light on. stay?
I'm scrambling on last minute details to get my boat ready for launch and I need to replace some wiring leading to the stern navigation light. It is mounted at the junction of the split backstay and the wire running to it appears to have been pretty embrittled by years of weather, and replacing the bulb didn't bring the light back to light. I'm going to just go ahead and replace the whole outside portion of the wire which is about seven feet long.
I'm just not sure what kind of wire I should use. I have lots of spare wire here left by the prior owner including more than enough of the marine wire that looks like household Romex. Is that what I should use? The wire I am replacing was only one layer of insulation and I'm thinking maybe that kind is better as less likely to trap moisture, or maybe the romex-style stuff is better because it's got more layers of protection. But I'm imagining water getting in at the top from rain or just condensation and seeping down by capillary action as a possible failure mode.
All of the other outside wires that I see are specific things like the GPS antenna, which is a thin stranded wire fully sealed for the entire length that is outside. The other navigation light, at the front, has the wire routed inside the bow pulpit ... I think a term is escaping me but it's inside the metal tubing that the lifelines connect to.
I'd also kind of like to just replace the whole fixture but access sucks. It's right above my steering console and access if limited by the Bimini. Nowhere to put a ladder so I'm precariously balanced to reach it... so, removing the bulb part is doable but I'm not sure that taking the whole thing off to redo would be convenient. Just that it's almost the same price for an LED bulb alone versus a whole new sealed fixture.
But either way I need to use the correct kind of wire. There is an above waterline fitting through the deck and I'll put the crimp inside of there and run it to the bulb holder that screws into the bottom of the fixture. I just want to use the right wire so I don't have to redo it in a state of shame.