Please Help a Friend

Discussion in 'Instruments / Avionics / Electrical System' started by Joe Spirit Walker, Mar 11, 2004.

Help Support HomeBuiltAirplanes Forum by donating:

  1. Mar 11, 2004 #1

    Joe Spirit Walker

    Joe Spirit Walker

    Joe Spirit Walker

    Member

    Joined:
    Jan 28, 2004
    Messages:
    21
    Likes Received:
    0
    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:

    ----------------------------------------------------------------------
    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?
    ------------------------------------------------------------------------

    Thanks For Your Help.
    Joe
     
  2. Mar 12, 2004 #2

    mplafleur

    mplafleur

    mplafleur

    Member

    Joined:
    Mar 3, 2004
    Messages:
    23
    Likes Received:
    0
    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.
     
  3. Mar 15, 2004 #3

    spark

    spark

    spark

    Member

    Joined:
    Mar 13, 2004
    Messages:
    13
    Likes Received:
    0
    I believe you can find a chart in AC 43.13. I will have to look when I get to work Mon. morning.
     

Share This Page

arrow_white