[AT] Tractor wiring

[charlie hill]

I must confess that I kinda knew the answer to my question.  I was just 
trying to make the point at it is not quite as simple as V x A = W.

Charlie
----- Original Message ----- 
From: "Spencer Yost" <yostsw at atis.net>
To: <at at lists.antique-tractor.com>
Sent: Wednesday, November 17, 2004 11:44 PM
Subject: Re[2]: [AT] Tractor wiring


> Resistance is a function of current flow, therefore resistance is twice 
> the
> problem at 6 volts than 12 volts if the load is the same and cable must be
> bigger to mitigate resistance losses.   I understand resistance is the
> biggest reason 12 volts was adopted instead of 6 and 120 volts was settled
> on for residential wiring.  120V was a compromise between "higher is
> better" and too high is dangerous.
>
> Spencer Yost
> Owner, ATIS
> Plow the Net!
> http://www.atis.net
>
> *********** REPLY SEPARATOR  ***********
>
> On 11/17/2004 at 9:51 PM charlie hill wrote:
>
>>Here is my question on this subject.
>>
>>Why are battery cables for 6 volt systems heavier than those for 12 volt
>>applications?   Assuming both are powering a starter to turn a similar
>>size
>>engine (similar load), why would the 6 volt cable need to be bigger.  It
>>flows more amps but less voltage and should flow roughly the same wattage
>>in
>>both applications.
>>
>>Charlie
>>
>>
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