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What math is involved to determine how many smaller wires equal a larger wire?

Started by rukiddingme, January 15, 2014, 05:15:54 PM

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Dave45

#5
January 17, 2014, 05:48:51 AM
Why not weigh the wire, cut one or two inch pieces and weigh them.

MarkE

#7
January 17, 2014, 06:00:51 AM
Every three gauge steps almost identically doubles the area of the wire.  If you go up five wire gauges, then you will need four of the smaller diameter wires to get below the resistance of one of the larger wires at DC.  For AC currents, the ratios converge due to the skin effect.  It's not that little wires get better, it is that thick wires get much worse.
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