On Sat, 17 Nov 2007 11:11:26 -0800, Gordon wrote:

Looking at a 1200 watt Lofrans. 80 to 110 amps. 40' from batts to
windlass.
What size wire?
Thanks
Gordon

The electric utilities don't like to lose more than 10% of their power
in transmission lines. If you adopted the same policy, you would look
for a 1.2 volt drop or less in 40 ft times 2 (there n back)

You are therefore asking: what gage wire will have a resistance value
of R = E/I = 1.2 V / 100 A per 80 ft or
0.012 X 100/80 ohms per hundred ft. = 0.015 ohms/hundred ft.

I could look it up, but you could probably do this too.
It's somewhere between 1/0 and 2 AWG.

Regards


Brian W