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Joined: Oct 2000
Posts: 2,749
Member
Question:

When performing an insulation test using a megger on cables in a 600 volt system, megger scale is 1000 volt dc.

Why do cable manufacturer's recommend a megger scale of 500 volt dc?


Joe Tedesco, NEC Consultant
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Joined: Mar 2002
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Ron Offline
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According to NETA:
7.3.2 Cables, Low-Voltage, 600 Volt Maximum
Perform insulation-resistance test on each conductor with respect to ground and adjacent conductors. Applied potential shall be 500 volts dc for 300 volt rated cable and 1000 volts dc for 600 volt rated cable. Test duration shall be one minute.


Ron
Joined: Nov 2000
Posts: 246
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Ron, what does NETA stand for? Do they have a web site?

Rick

Joined: Mar 2001
Posts: 345
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Quote
Ron, what does NETA stand for? Do they have a web site?


I hope you will forgive a wild % guess. Below is the URL of the InterNational Electrical Testing Association.
http://www.netaworld.org/
--
Tom Horne


Tom Horne

"This alternating current stuff is just a fad. It is much too dangerous for general use" Thomas Alva Edison

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