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Old 19th October 2003, 03:45 PM   #1
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Default Wire AWG & Amperage Capacity

Hello,

I have a simple question and could not find the answer by searching the postings.

Lets assume a 14awg wire has a current handling ability of X.

I know that (4) 20awg conductors is the equivelant of (1) 14awg.

Now, the (4) 20awg conductors are individually insulated. If these (4) conductors are bundled (paralled) together will they collectively have the same current handling capability as a single 14awg?.

Any input would be appreciated.

Thanks

KevinLee
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Old 19th October 2003, 06:37 PM   #2
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Absolutely correct.

Tim
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Old 19th October 2003, 07:01 PM   #3
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Quote:
Absolutely correct
i agree.......
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Old 19th October 2003, 08:03 PM   #4
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WRT wire area, yes, you are correct, but WRT ampacity, I afraid temperature has to be taken into account as can be seen from this chart:
http://xtronics.com/reference/wire_gauge-ampacity.htm
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Old 19th October 2003, 08:44 PM   #5
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Hello Roddyama,

What I am trying to do is roll my own ac cord for my integrated amp & cd player etc.

According to your link, a 20awg wire on its own is good for about 7 amp of current draw.

What would be the real world amperage capacity of (4) 20awg solid core wires with teflon insulation in parallel? They will be bundled and enclosed in expandable nylon braid tubing.

Does anyone have any ideas?

Thanks

KevinLee
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Old 19th October 2003, 10:57 PM   #6
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That's true, but in the current densities we are [hopefully] talking about, temp rise is out of the question. But for heavy currents, the quad will dissipate more heat and handle more power. So using that in place of 14AWG is safe.

Are you using four for each lead, or two coming, two going?

Tim
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Old 20th October 2003, 12:21 AM   #7
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Hi again,

I am using 4 for each conductor for a total of 8. I will not be using a ground as my gear does not have one now.

Thanks

Kevin
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Old 20th October 2003, 04:28 AM   #8
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Ok. Then let's see, you didn't mention your power consumption so I'll take the worst possible case... say that integrated amp is 100W class A stereo... that's like 600W consumption... round it out to 800W just in case... at 100V, that's 8A, and at 2,000A per square inch, that's 6.5A capacity... so a little thicker might actually be good. But then, somehow I doubt you have such a hefty power amp, and besides, the rounding errors I just took above add up to more than that difference anyway.

I say go for it.

Tim
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Old 9th December 2003, 05:17 PM   #9
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Hello,

Is a 20AWG solid core teflon coated wire large enough to carry 3-4 amps of current.

I am adding a seperate bridge and filter bank to my integrated amp (for the pre-amp section). So, I am only dealing with about a max of 35 volts.

Any input appreciated.

Thanks

KevinLee
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Old 9th December 2003, 05:43 PM   #10
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when calculating wire dimensions I use 3A/mm2 as a rule for continous use
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