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Old 05-12-2008, 05:19 PM
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Does 16+16=8?

Hi
I wanted to use a short piece of #8 wire to go to a junction block. None of the auto store around here have #8 wire. If you take 2 equal lenghts of #16 wire and connect them at both ends will it act as a single #8 wire?

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Old 05-12-2008, 05:45 PM
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Pretty sure not......................What you have to do is take the diameter of the wire X pi (3.1416) to get the area of each wire.....That would be a closer measurement. Bet you, it's more like 4 of them.
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Old 05-12-2008, 05:51 PM
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Yes and No . They will accept double the rated amps when doubled up , but will still burn-up faster than 8 gauge due to their thinner diameter ( slightly less mass ) . If you stripped them all the way out , pigtailed them together the full length , and then re- insulated them , it would be better than just connecting them at the ends. But that's a lot of work . Just put three of them together and play it safe . Edit didn't see Poncho's 4 piece idea before posting - that might be the ticket !)
My Math : 16ga. + 16ga. +16ga. = 6 gauge . If 8 will work , 6 will be more betterest.

*I'd wait for some more opinions first , as I only dabble in eletronics/electricity as a hobby - I'm no pro.*
I can put 26 speakers in a '72 Skylark , though.
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Old 05-12-2008, 06:27 PM
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Try Home Depot or Lowes in their electrical section, they have all kinds of wire. TF
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Old 05-12-2008, 07:08 PM
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No it is not equal, you can probably go to any electrical supply house and get whatever you need by the foot or spool.
I found a chart and 16 gauge is rated at 22 amps where as 8 gauge is rated at 78 amps in the standard charts. There are also voltage drop numbers which increase dramatically with higher gauge wires.

8 gauge is almost triple the size of 16 gauge
16 = .0508
8=.1285

Chet
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Old 05-12-2008, 07:09 PM
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Quote:
Originally Posted by poncho62
Pretty sure not......................What you have to do is take the diameter of the wire X pi (3.1416) to get the area of each wire.....That would be a closer measurement. Bet you, it's more like 4 of them.
Right idea, wrong formula. Pi x diameter gives you circumference. Pi x radius^2 gives you area.

Unfortunately, wire gauge does not correspond to diameter in a one-to-one correspondance. 16 gauge wire is .0508" in diameter. 8 gauge wire is .1285" in diameter - MORE than twice the diameter. Do the math and you find that a 16 gauge wire has .002 sq in of area, an 8 gauge wire has .013 sq in - it would take more than SIX of the smaller wires to equal the area of the larger wire.
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Old 05-12-2008, 07:12 PM
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Right....its been a while.......You mean Pi x R squared........
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Old 05-12-2008, 09:18 PM
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Originally Posted by poncho62
Right....its been a while.......You mean Pi x R squared........
Pies are round

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Old 05-13-2008, 04:00 AM
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