Battery Cable - wire size?

77SceptreOB · #1 07-20-2018, 08:43 PM

I'm installing a battery switch and need to run cable for 6'. What gauge wire should I use? This will be for a starting battery for a V-6 Outboard. Any thoughts? I was thinking #2 or #4.

Thanks,

Jim

FLexpat · #2 07-20-2018, 08:57 PM

Use the voltage drop calculator listed here: http://www.marinewireandcable.com/20...lculation.html

DonV · #3 07-20-2018, 09:35 PM

Jim, for 6' the #4 is good, easy. If it's for the mighty 225 Excel go with #0 welding cable, it's a bad engine!!!

erebus · #4 07-20-2018, 09:41 PM

Heres the wire size calculator I use all the time.
Need to know the max amps you'll be drawing though.

http://circuitwizard.bluesea.com/

2 gauge wire going 6 feet is good for up to 200 amps.