Battery cable insulation has a much higher thermal
rating than welding cable. Current carrying capacity
is a function of conductor cross sectional area and
material resistance for a given heat rise. In this
respect, they're the same for a given size, though
the welding cable will carry less max current for a
given size in the elevated temperature of an engine
compartment.
Even battery cable insulation isn't good enough in
this application though. It will take type PFA or TFE
(or equal) if no sheath is used.
The main attribute of welding cable is it's
flexibility due to high number of strands.
GM
----- Original Message -----
> There was a general article in the Brickline June
1986, vol. 11, #2 page 12
> "Using Welding Cable for Remote Battery Hookup."
It was a reprint from
> another magazine and not actually how to do it.
BTW, I asked my electrical
> guy about it a while back and he said battery cable
was superior. I assumed
> he meant it had less resistance, but I never tested
it.
>
> George
>
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