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#86848 - 12/19/03 07:10 AM Insulation Test Using Megger On Cables
Joe Tedesco Offline

Registered: 10/07/00
Posts: 3325
Loc: Boston, Massachusetts USA

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

2014 / 2011 NEC & Related Books and Study Guides
#86849 - 12/19/03 07:37 AM Re: Insulation Test Using Megger On Cables
Ron Offline

Registered: 03/13/02
Posts: 577
Loc: White Plains, NY
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.

#86850 - 12/19/03 12:58 PM Re: Insulation Test Using Megger On Cables
rmiell Offline

Registered: 11/09/00
Posts: 261
Loc: La Junta, Co. USA
Ron, what does NETA stand for? Do they have a web site?


#86851 - 01/05/04 10:05 AM Re: Insulation Test Using Megger On Cables
tdhorne Offline

Registered: 03/22/01
Posts: 344
Loc: Maryland, USA
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.
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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