re Wire for starter / tilt trim / etc...
House wiring is not a good idea. Romex does not have the corrosion
resistance.
Romex (AKA type NM-b) is not listed for wet locations but the relity is it is
usually assembled from THHN/THWN. The real problem with NM is the fact that it
is solid wire. That will break when it is vibrated. A better choice would be
the stranded THHN/THWN single conductor. That is rated for wet locations.
Personally I think the thicker stranding is better in a corrosive environment
it it doesn't have to flex.
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