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Battery cable size?
Posted: Fri Dec 26, 2014 1:34 pm
by mgarvie
I'm considering relocating my batteries and the more I read about sizes the more I'm confused. I have a Yamaha 60hp 4 stroke and I am having no luck finding how much current the starter draws. The distance from the battery switch to the motor would be around 17 feet (34 feet round trip). Opinions?
Re: Battery cable size?
Posted: Fri Dec 26, 2014 1:53 pm
by MH Hawker
A sort of ball park estimate is around is 250 amps for the starter, and for that long of a run at least a 1/0 cable.
Re: Battery cable size?
Posted: Fri Dec 26, 2014 6:43 pm
by TDJ2591
Here's the link to a voltage drop calculator that should help.
http://www.calculator.net/voltage-drop- ... &x=79&y=17
Re: Battery cable size?
Posted: Fri Dec 26, 2014 8:38 pm
by mgarvie
Thanks for the information. Looks like the price to move the batteries isn't worth it. Think I'll order some vinyl flooring instead.
Re: Battery cable size?
Posted: Fri Dec 26, 2014 9:20 pm
by tuned
Here is the chart I always use. It is nicely explanatory. And it agrees with James at 1/0...ish.
http://www.westmarine.com/WestAdvisor/M ... d-Ampacity
Re: Battery cable size?
Posted: Sat Dec 27, 2014 4:23 pm
by MH Hawker
Yea that was a very generalized guess