Wire gauge calculator?
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 11th October 2005, 10:45 AM #1 xyrium   diyAudio Member   Join Date: Apr 2005 Location: NJ Wire gauge calculator? Does anyone know what the formula is to determine the resulting wire gauge of two or more combined wires? ie: What gauge are two 24ga wires once combined? Tks, Paul
 11th October 2005, 11:30 AM #2 bobhayes   diyAudio Member     Join Date: Sep 2004 Location: Bungawalbyn, NSW Two wires in parallel is equivalent to 3 guages larger. 2 x 24g = 1 x 21g you can calculate it also. 24g = 0.021" or 0.533mm diameter cross sectional area = Pi[(dia/2)^2] or Pi(r^2) Pi=3.14 (actually 3.1415927) and is always the same for any equation using Pi. therefor 0.021"/2 =0.0105 then 0.0105^2= 0.0001102 then area= 0.0001102x3.14=0.0003463"^2 2 wires=2x0.0003463=0.0006927"^2 working back: 0.0006927/3.14=0.0002205 then r= sq.rt 0.0002205=0.01485" then diameter=2x0.01485"= 0.0297" Actually 21g=0.02845", but it's close enough! It works in metric too. Looks long winded, but if you use it often, it's 20 seconds work with a calculator.
 11th October 2005, 04:13 PM #3 xyrium   diyAudio Member   Join Date: Apr 2005 Location: NJ That's perfect, thanks Bob! Rgds, Paul
 11th October 2005, 04:18 PM #4 lgreen   diyAudio Member     Join Date: May 2003 Location: San Diego, USA If you would like more information on wire thicknesses and wire properties, note that the Krell Build Wiki has a link to Post #2677 of the Krell thread ... linking to a car audio (wire) website that has much useful information on wire and wire thicknesses, with useful calculators.
xyrium
diyAudio Member

Join Date: Apr 2005
Location: NJ
That's interesting. I actually paid this guy for the CD of his site two years ago...I wonder if I have it still. Thanks for the reminder.

Quote:
 Originally posted by lgreen If you would like more information on wire thicknesses and wire properties, note that the Krell Build Wiki has a link to Post #2677 of the Krell thread ... linking to a car audio (wire) website that has much useful information on wire and wire thicknesses, with useful calculators.

GM
diyAudio Member

Join Date: Jun 2003
Location: Chamblee, Ga.
Quote:
 Originally posted by bobhayes Looks long winded, but if you use it often, it's 20 seconds work with a calculator.
Greets!

Even quicker :

summed effective dia. = dia. of one wire*SQRT(number of wires)

Since 24 ga is closer to ~0.0201" dia. according to the chart I used at work:

~0.0201*SQRT(2) = ~0.2843", or very close.

Going to extremes with (32) wires it adds up though since we should get a 15 ga difference, or 9 ga = 0.1144, but it's still plenty close enough compared to 10 ga = 0.1019" :

0.0201*SQRT(32) = ~0.1137"

GM
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bobhayes
diyAudio Member

Join Date: Sep 2004
Location: Bungawalbyn, NSW
Quote:
 Originally posted by GM Greets! Even quicker : summed effective dia. = dia. of one wire*SQRT(number of wires)
That's great!

Makes sense really doesn't it?

Dims ^2= Area
Sq.Rt.Area= Dims!

Of course.

 12th October 2005, 10:36 AM #8 Tweeker   diyAudio Member   Join Date: Dec 2004 Location: Cincinnati, Ohio 10 wires will be the equivalent of 1 wire 10 gauges lower, and 3 gauges lower is a doubling, its a logarithmic scale based on the copper area. Solid wire diameter increases/decreases by a factor of about: 2 every 6 gages, 3 every 10 gages, 4 every 12 gages, 5 every 14 gages, 10 every 20 gages, 100 every 40 gages,

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