The "area" of the conductor will be 3 times and you would think that the
NEC Ampacity would also be 3 times
that of one conductor. But one LARGE conductor with the same area
might not be as high as you think
because of insulation. I would think that ampacity of 3 cables in
parallel would be 3 times. But probably
not when you take a single cable of the 3X area out of the NEC table.
(I haven't looked at this to verify)
Also, Larry, 325 AWG 750 AWG (gauge) wire is a bit too small for this,
don't you think ?
I know... You mean circular mils...
boB
On 12/2/2014 1:49 PM, Larry wrote:
That's the part that is throwing me off. If I have 3 times the
circular mil and compare that to a single conductor of similar
circular mil, how do I have 3 times the ampacity? These are very
different numbers.
Example: 1/0 @ 90c is 170 amps x 3 = 510 amps. 510A is what a
conductor just over 750 AWG will carry. The circular mils of 3 1/0
cables is only 325,050 or a 325 AWG cable which would be rated at
about 330 amps.
So, is it 510 amps (3x the ampacity) or 330 amps (3x circular mil)?
And, more importantly, why?
Larry
On 12/2/14 11:14 AM, Bill Turberville wrote:
I am sorry. Bad fingers. Three times the ampacity under the same
conditions.
*From:*RE-wrenches [mailto:[email protected]
<mailto:[email protected]>] *On Behalf Of *Larry
*Sent:* Tuesday, December 02, 2014 12:09 PM
*To:* RE-wrenches
*Subject:* Re: [RE-wrenches] Parallel Wire combining
OK, let's use 1/0 for the example. 108,350 x 3 = 325,050. Do I now
have a cable between 300 and 350 AWG?
Thank you,
Larry
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