Originally Posted by hellosailor
on land you could just grab another foot of wire, use a wirenut to add it on, and get yourself some more room. Wirenuts are discourage in marine
use though, and replacing the whole piece of wire is better. (Personally I'd expect that a wirenut, with some silicon grease in it and a nice overwrap of tape, would be perfectly good but the pros assure me it will cause the world to end.)
Digression - Inspectors in my neck of the woods wouldn't pass an electrical
job if there was a wire-nutted splice in the breaker box. Also, if lengthening a wire is necessary for a repair, then there wasn't enough slack wire left when the panel was originally wired.
To Mr Bulmer's issue - if the corrosion was limited to just the bared area, and the wire end isn't damaged/burnt/missing strands, then yes it's sufficient to clean it up, reattach, and make sure it's tightened firmly; loose connections fail sooner. If you need to splice on some wire, do so, using the same gauge wire and the right-sized butt-connector, crimped
Wire nuts are a no on boats mainly because they were designed for solid, not stranded wire. The "grab" of a wire nut on multi-stranded wire is iffy, and there will be broken strands as the twist tightens up. I'd wire-nut an emergency
repair, but never anything permanent.