Author Topic: Wire gage ?  (Read 1372 times)

0 Members and 1 Guest are viewing this topic.

Jerry

  • Hero Member
  • *****
  • Posts: 1519
Wire gage ?
« on: February 14, 2006, 04:23:51 PM »
I have 24ga,22ga, 21ga,20ga and 18ga.


Is there any 2 in this group that are 1/2 size. ? is 24ga. half the ga of 18ga.


Or any inthis group that are half?


                       Thanks.


                          JK TAS Jerry

« Last Edit: February 14, 2006, 04:23:51 PM by (unknown) »

johnlm

  • Full Member
  • ***
  • Posts: 244
Re: Wire gage ?
« Reply #1 on: February 14, 2006, 09:27:04 AM »
Jerry,

The rule of thumb (very close approximation) is this.  Go up 3 guage sizes and you have 1/2 the circular mills; go down 3 guage sizes and you have 2X the circular mills.  So awg 21 is double awg 24. and awg 18 is double awg 21 etc.


Johnlm

« Last Edit: February 14, 2006, 09:27:04 AM by johnlm »

zubbly

  • Sr. Member
  • ****
  • Posts: 371
Re: Wire gage ?
« Reply #2 on: February 14, 2006, 11:52:05 AM »
hi jerry!


if you think this way, you will not need a wire chart to find equivalents in other sizes.


take any wire gauge size (example #18) count up 3 sizes= using 2 #21 gauge



  1. #17 would be equal to 2#20
  2. #15 would be equal to 2#18
  3. # 20 would be equal to 2#23
  4. #15 would be equal to 4#18


to find equivalent in 1/2 size gauge wire (example #181/2) count up 3 sizes and 4 sizes.

so 1#181/2 would be equal to 1#21 and 1#22


  1. #151/2 would be equal to 1#18 and 1#19
  2. #171/2 would be equal to 1#20 and 1#21
  3. #221/2 would be equal to 1#25 and 1#26


hope this helps  :)

zubbly

« Last Edit: February 14, 2006, 11:52:05 AM by zubbly »

zubbly

  • Sr. Member
  • ****
  • Posts: 371
Re: Wire gage ?
« Reply #3 on: February 14, 2006, 11:54:15 AM »
hi again jerry!


forgot to answer your main question.  #21 would be 1/2 the size of #18


zubbly

« Last Edit: February 14, 2006, 11:54:15 AM by zubbly »

SparWeb

  • Global Moderator
  • Super Hero Member Plus
  • *****
  • Posts: 5452
  • Country: ca
    • Wind Turbine Project Field Notes
Re: Wire gage ?
« Reply #4 on: February 14, 2006, 11:55:39 AM »
First hit on a Google search:


http://www.powerstream.com/Wire_Size.htm

« Last Edit: February 14, 2006, 11:55:39 AM by SparWeb »
No one believes the theory except the one who developed it. Everyone believes the experiment except the one who ran it.
System spec: 135w BP multicrystalline panels, Xantrex C40, DIY 10ft (3m) diameter wind turbine, Tri-Star TS60, 800AH x 24V AGM Battery, Xantrex SW4024
www.sparweb.ca

richhagen

  • Hero Member
  • *****
  • Posts: 1599
  • Country: us
Re: Wire gage ?
« Reply #5 on: February 14, 2006, 03:34:33 PM »
If the rule of thumb that increasing the size by 3 guages isn't sufficient for you, here is a wire resistance calculator I wrote a while back, you can enter a guage and length and calculate the resistance, and then blank out the guage and change the units to square millimeters and recalculate, comparing for different guages.  Or you can just use it as it is designed to calculate the resistance in a wire of certain cross sectional area and length.  Rich Hagen


http://www.otherpower.com/images/scimages/742/WIRECALC.exe

« Last Edit: February 14, 2006, 03:34:33 PM by richhagen »
A Joule saved is a Joule made!

Jerry

  • Hero Member
  • *****
  • Posts: 1519
Re: Wire gage ?
« Reply #6 on: February 14, 2006, 08:32:59 PM »
Thanks a bunch guys. Sounds like I have the wire I need for the next project.


                   JK TAS Jerry

« Last Edit: February 14, 2006, 08:32:59 PM by Jerry »