Please Help a Friend

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Joined
Jan 28, 2004
Messages
21
Location
Taos, NM
A friend asked a question, I would REALLY like some help from the folks in here in answering.........For a common person to understand......What are your opinions?

Below is his E-Mail:

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I am fixing to replace the alternator and battery-to-main-buss
cables and want the least cable and least resistance. This
generates a question for any EEs out there. I seem to recall
that something around 45 years ago, I was taught that
electricity travels on the surface of the wire [strands] and so,
for a given diameter of cable, finer strands => more surface
area => less resistance with the bonus of being more flexible.
More recently, I thought I heard that this only applies to very
high frequency AC, and that for DC or lower frequency AC it's
the cross sectional area that matters, not the surface area, so
a solid conductor is better. Help me out here. Do I use 8-ga
wire out of ASS or Wick's, or go to a welding supply shop and
buy some 10-ga fine strand cable?
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Thanks For Your Help.
Joe
 

mplafleur

Member
Joined
Mar 3, 2004
Messages
23
Location
Metro Detroit
The electrons in wire tend to congregate at the surfaces. The more conductors the better, but don't overdo it. The extra cost isn't worth it. Besides, it's harder to trim and crimp the real fine stuff and not nick or cut some of the wires.
 

spark

Member
Joined
Mar 13, 2004
Messages
13
I believe you can find a chart in AC 43.13. I will have to look when I get to work Mon. morning.
 
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