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Tractor Talk Discussion Forum

Ground Cable Size - 6V

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Way Up Here

09-03-2005 05:49:48




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I know from reading here an other references that those of us running 6 volt systems should be using a HEAVY cable from the battery into the system. But how about the ground strap, does it need to be matched to the other cable in size or dan it be lighter? I still like the flat, braided style of ground strap myself but they're getting hard to buy. Anyways, what about the size of a round ground cable for a 6 Volt system?

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Paul in Mich

09-03-2005 06:56:59




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 Re: Ground Cable Size - 6V in reply to Way Up Here, 09-03-2005 05:49:48  
The braided ground straps work very well for 6 volt systems, and they are available, but now getting a little pricy. It seems as tho I paid around $10.00 each for two of them a while back. As for the negative side cable (pos ground), the heavier, the better. 1 gauge or 0 gauge, but no smaller than 1 gauge. I found a piece of 0 gauge welder cable that works great. The secret to any cable is to use soldered ends, as that way you are getting a full flow of current through the entire cable rather than just the outside strands.

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John T

09-03-2005 06:11:21




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 Re: Ground Cable Size - 6V in reply to Way Up Here, 09-03-2005 05:49:48  
On 6 volt systems, I highly recommend the use of 00 Gauge Battery and Ground and Starter Cables. i.e. any and all high current carrying conductors. I like the braided cables on ground straps provided they are rated equivalent to 00 or larger. They are good for 2 reasons, one the great flexibility (to resist vibration stresses) plus due to the "skin effect" of current flow in conductors, all those smaller conductors are more efficient than lesser number of larger conductors.

Since youre only starting with 6 volts, you cant afford to drop much voltage acrosss the cables and loose energy there as heat versus expending it all at the starter where its really needed. I also recommend the use of the absolute highest rated battery that can physically fit into the battery compartment and have ALL battery n starter n ground conenctions clean n tight.

John T Nordhoff in Indiana, retired electrical engineer

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