Worth buying, IMO, is a book... "The 12 Volt Doctor's Practical Handbook".
Got my copy at BOAT/US several years ago.

Butch
"Gary" wrote in message
...


12-Volt DC wiring for a small boat tends to be
mostly simple and straightforard. A few things:

It's really good to seal all the connections well. I used
connectors that have heat-shrink built in. Make sure the
connector has a good grip on the wire when you crimp
the connector on. Then use the heat-gun / blow-dryer
to activate the shrink stuff.


Get some dielectric grease and put it on any
metal parts of connectors still showing...and on
the battery terminals. It keeps them from corrding.


Use switches that are made for Direct Current and
are rated for the amps & voltage they will carry. Don't
use items that are for Alternating Current. (I did this
once).


If you have specific concerns about how to design your
system, ask here - you'll get lots of good answers.


Gary