Ground wire on an aluminum boat

[sberl]

Hello all,
I'm restoring an aluminum boat and cannot seem to find an answer to my question. The diagram below is from the switch panel I purchased. Where should I connect the black (earth) wire to? To a negative terminal on the fuse block or attach it to something metal which is connected to the hull? Or is it neither of those two? Thanks in advance!

 

[TyeeMan]

The negative terminal on the fuse block should go directly to the battery so you could connect it to that. Or run a wire to the negative terminal on the battery.

Never, never connect any ground wires to the boat/chassis itself, you'll be in for all sorts of electrical headaches.

 

[Scott Danforth]

to expand on Tyee's comment of never

if you ground accessories to the hull of the boat, you can watch the boat literally disappear in a very short period of time as galvanic corrosion eats the hull.

 

[sberl]

Exactly what I was looking for. Thanks much guys!