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donjohnston
Joined: 13 Dec 2009
Posts: 231
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 Posted: Mon Nov 04, 2013 5:51 pm Post subject: When is 2AWG not 2AWG? |
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I purchased some 2AWG welding cable from McMaster-Carr. But the 2AWG ring terminals are too big. After trying all the ring terminals in my collection, the ones that fit are for 4AWG.
Does welding cable have a smaller diameter than... regular wire?
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nuckolls.bob(at)aeroelect
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| Posted: Mon Nov 04, 2013 6:39 pm Post subject: When is 2AWG not 2AWG? |
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At 07:51 PM 11/4/2013, you wrote:
| Quote: |
I purchased some 2AWG welding cable from McMaster-Carr. But the 2AWG
ring terminals are too big. After trying all the ring terminals in
my collection, the ones that fit are for 4AWG.
Does welding cable have a smaller diameter than... regular wire?
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The standard for sizing wire is predicated
on the cross-section of copper . . . so a
10AWG SOLID wire will be a tad smaller in
diameter than STRANDED wire due to the
included air-space between strands. As a
general rule, copper wires can be counted
on to be as-advertised. Aluminum wire has a
slightly higher resistance. Assuming that
it is marked for AWG equivalency, then a
2AWG aluminum wire would be decidedly larger
than it's copper cousin.
Terminals are another matter. You cannot
know the tooling for which the terminal was
designed . . . which may indeed bring a
'too big' terminal down to size with the
right squish. So pick the terminal with
the tightest practical fit and then close
the gap with wedges/solder or judicious
application of force.
The 'rating' for wire is more consistent
and reliable than the sizing of terminals.
Bob . . .
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donjohnston
Joined: 13 Dec 2009
Posts: 231
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