On Wed, 05 Sep 2007 10:12:03 -0400, Ned Simmons
wrote:

On Tue, 04 Sep 2007 23:28:21 -0400, clare at snyder.on.ca wrote:

On Tue, 04 Sep 2007 20:00:07 -0400, Ned Simmons

However, when running a welder on an extention cord, you want a cord
capable of handling AT LEAST 120% of the expected load to reduce
voltage drop.

Unlike induction motors, most welders are tolerant of low input
voltage. The 185T will operate on 208V circuits, so if it's being
supplied by a typical 240V feed there'd have to be an awfully big drop
to bother it.


My little "MIG" welder runs on a 15 amp circuit on 110 volts. On a 50
foot 16 guage cord at full output the voltage drops to about 96 volts.
That reduces the maximum current of an already borderline welder
significantly.(14% voltage drop roughly 28% power drop?????)

In this case, a 20 foot, 12 ga extension with a 38A load @ 240V
results in a 2.5% drop, or 234V at the welder. Also note that the 185T
is an inverter welder - it acts like a switching regulator and draws
more current as the supply voltage drops, so I doubt you'd notice any
difference at the output.

I get about 30A running thru a 50ft, 16 ga extension for a 14V drop.
Are you sure the whole loss is in the cord?
Did you factor in both the power and the neutral? 100 feet of
conductor in total.

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