The problem with using a welder is that the actual current will jump around=
 depending on load conditions.
You will need an inverter welder that has a variable current setting, and t=
hose are expensive. =A0On the bright side, though, they are useful for more=
 than just testing wire.
If the welder doesn't display the current output in real time, you will als=
o need a clamp ammeter.
Don't attempt to measure the current with a multimeter or a shunt ammeter w=
ith a current rating under 300A, or it will explode!
So you can see why it is cheaper to use car batteries and light bulbs.

Cheers,
Robert

----------------------------------------
> Date: Mon, 16 Feb 2015 14:48:11 +1100
> From: quozl@laptop.org
> To: piclist@mit.edu
> Subject: Re: [EE] Insulation testing
>
> On Mon, Feb 16, 2015 at 03:26:03AM +0000, John Chung wrote:
>> Hmmm. You gave me an idea.........
>> Need to find a meter that can go down to miliohms.
>
> Yes, that will give you a ballpark figure, useful in most situations.
> Calculate the power emitted by the cable.
>
>> With that I would not need to test it out with a jig.
>
> Use a current meter, and a variable current source, or a variable
> voltage source with a resistor. Set it for the intended current.
>
> Measure temperatures of ambient and insulation before, during, and
> after.
>
> --
> James Cameron
> http://quozl.linux.org.au/
> --
> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> View/change your membership options at
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