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Restoration & Repair Tips Board

Re: Battery cable size Farmall H

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John T

07-30-2012 07:24:46

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Bottom line and basic engineering FACT the bigger the cable the less voltage drops and less I Squared R Heat loss. Since you only have 6 volts to start with and a heavy starting current draw might reduce that to as low as 4.5 YOU CANT AFFORD TO DROP MUCH VOLTAGE AND HAVE HEAT LOSSES IN THE CABLES, you need all the energy possible discharged in the starter NOT the cables.

So sure, heck a 1 or even 2 gauge cable will work and the starter will turn, but if she needs to start in cold temps, I in good engineering faith and conscience have to advise you use at least a 0 gauge better yet 00.

Your tractor your money your choice, bigger cable (best if not so big it can still fit the termination devices and ends of course) will allow for better cranking however

John T

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07-31-2012 07:21:14

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 Re: Battery cable size Farmall H in reply to John T, 07-30-2012 07:24:46  
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John, I have 2 Farmall Hs. Both of them are the original 6 volt systems. Both of them have #1 gauge battery cables. Both of them crank over easily and start well even at temperatures down to 0. The battery cables on a Farmall H are not all that long, and a #1 gauge cable will easily get the job done.

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John T

07-31-2012 08:24:49

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 Re: Battery cable size Farmall H in reply to rustyfarmall, 07-31-2012 07:21:14  
Good info especially for H fans, original is what I "usually" like to use, except for battery cables on 6 volt tractors, where bigger ones drop less voltage and theres less heat loss, but as long as she starts in cold weather and is ORIGINAL, hey thats what many choose and Im sure not one to argue against an owners choice, I'm NOT any "Correct Police" kinda guy lol................

John T

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