Meggering Feeders

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Dustin Foelber

Senior Member
Good Morning,
I have a project in which our inspector has requested we megger every subfeed. I purchased a klien ET600 meter that has a 4000MEGAOHM maximum. We are running our test phase to phase and all of our runs say 4000MOHMS as our reading? Am I doing this wrong? Mostly 1/0-3/0 XHHW copper. 100-200 ft runs.
I am lost. Any feedback on how to megger would be much appreciated.

Thank you!
 
It probably just displays what the maximum rating of the device is if it exceeds that rating, so I am not real surprised it would read 4000 MOhms.

What does the manual say?
 
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