[Milsurplus] Wire insulation

[John Hutchins]

Sheldon
Very good any one performed a hi-pot test on "automotive" cable?
This is why I ask.  My years ago I worked for a firm that manufactured light dimmers.  We would purchase large quantities of resistors, diodes, capacitors, transistors.... on bulk.  Then bin and re-mark the parts.  This is because as most of us know most part manufactures build one part and bin and mark the part depending on the order requirements.

So - Any one Hi-POT GXT automotive wire to see what the true insulation rating is?
WE'r taking 8.00 a spool compare to 34.00 a spool so this begs the question what is the true rating for GXT automotive wire.  Most of this stuff is rated from -50C to +125C, I-PVC, twisted coating.

Thanks Sheldon for the information
Hutch

On 4/23/2010 9:16 AM, sdaitch at kuw.ibb.gov wrote:
> Hutch,
>
> I am not sure a megger test would really answer
> the question you are asking.
>
> Granted, some megger test sets do use some higher
> voltages but the test voltage isn't a definitive
> test of the voltage rating of the insulation, other
> than to say if the resistance holds up, obviously
> the insulation wasn't damaged by that application
> of high voltage.
>
> To really get a feeling for the insulation rating,
> high pot testing is a far more definitive test of
> insulation.
>
> Wikipedia has a nice short decent explanation of
> high pot testing.
>
> http://en.wikipedia.org/wiki/Hipot
>
> or see:
>
> http://www.cirris.com/testing/guidelines/hipot_testing.html
>
> Basically, a high pot tester is a variable high voltage
> power supply with a current meter.  The voltage starts at
> zero and increased and the current leakage is monitored
> until it reaches a predefined voltage point or current
> leakage.  Under some test requirements, you increase the
> voltage to the point where the insulation fails.
> Normally, this is a manufacturing test.
>
> Out in the field, hi pot testing is done to verify the
> integrity of the insulation of an installed cable or
> equipment before the applicaton of operating voltages.
>
> 73
> Sheldon
>
> ----- Original Message -----
> From: John Hutchins<olegerityincj at austin.rr.com>
> Date: Friday, April 23, 2010 3:01 am
> Subject: [Milsurplus] Wire insulation
>
>    
>> All -
>>
>> Anyone know what the insulation voltage rating is for  GXT
>> automotive wire?
>> Yes the answer could be a bit broad !-}  I hope that some one out
>> there
>> took a megger to a section of this type of wire?
>>
>> - Thanks
>> Hutch
>>
>>      
>
>