J/30 Class Association Forums J/30 Forum The Boat, Sails and Equipment Electrical ground

Ryan is spot on with his suggestion on measuring the voltage drop. I burnt the main fuse socket by the battery switch last year due to oxidized terminals providing a high resistance path - it became a heater element under load. Additionally it appears that when the boats were built they did not used tinned wire. If you strip back the insulation, instead of bright shiny copper, you'll see black oxidized and in some cased green verdigris where salt entered on all the conductors throughout the boat.

Here are some links to J/30 wire harness schematics that were on the old J/30 web site:

"The wiring schematic from hull #406 is now available online. You can download page 1 , page 2 , or page 3 . For those of us with earlier hull numbers it provides a reference about the major elements of the electrical system, even if all the details aren't the same."

[This message has been edited by Rhapsody #348 (edited 06-27-2008).]