Battery cable selection

Bruce A. Frank wrote:
Gee, this discussion became convoluted. Your maximum draw on the circuit
would be when starting. Your battery may be rated in peak starting amps
capacity. One of the advantages of 24 volts over 12 is the ability to
use smaller diameter wires (weight savings). So, using the same diameter
for interconnection as was used for the 12 primary connection is
overkill. Low of mentioning of twice the voltage then half the wire
diameter...but I thought it was 1/4, but I am not an EE and it has a
loooong time since I have played with those calculations.{no, I don't
want to do the calculations right now! ;-) }


I don't blame you. Such calculations require higher levels math where
one leaves off counting on one's fingers and starts using one's toes.
This is called "algebra." Now, if one wants to use calculus...well,
calculus is found on one's teeth.

Dan, U.S. Air Force, retired

Or you can simply go to www.rstengineering.com and then to Jim's Engineering
page and then open up the spreadsheet "wiretable.xls", put in the wire size
and length that you want and let the magic of rather complex algebra (for
the temperature rise) be invisible in the answers.

Jim
I *am* an EE and I play one at the college every day {;-)



but I thought it was 1/4, but I am not an EE and it has a
loooong time since I have played with those calculations.{no, I don't
want to do the calculations right now! ;-) }

Bruce A. Frank wrote:

Gee, this discussion became convoluted. Your maximum draw on the
circuit would be when starting. Your battery may be rated in peak
starting amps capacity. One of the advantages of 24 volts over 12 is
the ability to use smaller diameter wires (weight savings). So, using
the same diameter for interconnection as was used for the 12 primary
connection is overkill. Low of mentioning of twice the voltage then
half the wire diameter...but I thought it was 1/4, but I am not an EE
and it has a loooong time since I have played with those
calculations.{no, I don't want to do the calculations right now! ;-) }

battery is heavier... are you sure you gain weight?

For wi section would be 1/2 as the amperage, diameter would be reduce
by 0,707.


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Volem rien foutre al païs!
Philippe Vessaire Ò¿Ó¬
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