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Old 11-25-2012, 10:59 AM   #13
Benesesso
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Joined: Jul 2008
Location: West of Phoenix, Arizona
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Quote:
Originally Posted by Pike Bishop View Post
As a kid, I had a model train set with brass rails, and I remember that ... but nowadays I have a TIG/stick welding machine that has solid brass DINSE connectors, which sometimes need to carry 310A @ some low voltage (maybe 20-30V depending on arc length?).

Considering the high currents and fairly low voltages, I wonder why they don't use something other than brass...
You're lucky it's not an older Hobart Mig welder. The high-current buss bars are freakin' aluminum. When copper/brass has some corrosion, the oxides/whatever will still have reasonably low resistance. Not so with alum. Al2O3 is a great insulator (think spark plugs), and as a connection resistance goes up so does the temperature.

It might even be capable of burning a house/trailer down to the ground.
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