Hi John,

1. Don't forget that insulation heat testing is also lifetime based. PVC in
particular degrades quicker at higher temperatures so a particular current
rating may be based on an X year life.
2. Also, the resistance will increase as the temperature rises. So the
heating will effect will increase.

You could test with a car battery and a variety of headlamp bulbs.

RP

On 16 February 2015 at 16:26, John Chung <kravnus@yahoo.com> wrote:

> Hmmm. You gave me an idea.........
> Need to find a meter that can go down to miliohms.
>
> With that I would not need to test it out with a jig.
> John
>
>
>       From: Sean Breheny <shb7@cornell.edu>
>  To: Microcontroller discussion list - Public. <piclist@mit.edu>
>  Sent: Monday, February 16, 2015 9:57 AM
>  Subject: Re: [EE] Insulation testing
>
> I think we need more details. What kind of cable are you talking about?
> There are standard tables which relate current, wire gauge, insulation
> type, and temperature rise. If you add your maximum ambient temperature t=
o
> this rise, you can compare it to the cable's max temperature spec to
> determine the proper max current.
>
> Have a look at:
>
> http://en.wikipedia.org/wiki/American_wire_gauge
>
> for a start. The table part-way through the article gives American NEC
> (National Electrical Code) limits on current versus insulation temp ratin=
g
> and wire gauge.
>
> Sean
>
>
>
>
> On Sun, Feb 15, 2015 at 8:22 PM, John Chung <kravnus@yahoo.com> wrote:
>
> > How would you guys test the maximum ampere rating on the insulation on
> the
> > cable itself? The bench power supply is about 5 amps max.The welding
> > machine? Over kill and too much trouble. Like to hear your ideas.
> > John
> >
> > --
> > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> > View/change your membership options at
> > http://mailman.mit.edu/mailman/listinfo/piclist
> >
> --
> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
>
>
> --
> http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
> View/change your membership options at
> http://mailman.mit.edu/mailman/listinfo/piclist
>
--=20
http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive
View/change your membership options at
http://mailman.mit.edu/mailman/listinfo/piclist
.