Re: Batttery Cable Hookup

Posted by Bob M on May 14, 2007 at 12:47:31 from (151.190.254.108):

In Reply to: Re: Batttery Cable Hookup posted by John T on May 14, 2007 at 12:10:46:

I gotta agree with you John T - that's it how was taught to me too.

"Skin effect" is an frequency-dependent AC phenomenom. For DC and low frequency (eg. 60Hz) AC currents, the only thing matters is cross sectional area of the conductor. Skin effect simply is a non-factor for DC and low freq AC.

Ie. a #1/0 1045 strand copper welding cable, #1/0 273 strand locomotive cable, #1/0, 133 strand automotive battery cable, #1/0 19 strand aerial cable and a 0.083" square inch solid copper bus bar all exhibit exactly the same DC resistance per unit length. The only reason for different strand diameters/numbers of strands is to provide the degree of mechanical flexibility required for a particular application.

However for AC currents at RF frequencies all I know is skin effect and conductor surface area become VERY critical. (Beyond that RF is a field which I don't begin to comprehend!)

Replies:

• Re: Batttery Cable Hookup BF8690 14:08:24 05/14/07 (0)

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