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#86848 - 12/19/03 11:10 AM Insulation Test Using Megger On Cables  
Joe Tedesco  Offline
Member
Joined: Oct 2000
Posts: 2,749
Boston, Massachusetts USA
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

2017 / 2014 NEC & Related Books and Study Guides

#86849 - 12/19/03 11:37 AM Re: Insulation Test Using Megger On Cables  
Ron  Offline
Member
Joined: Mar 2002
Posts: 582
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.


Ron

#86850 - 12/19/03 04:58 PM Re: Insulation Test Using Megger On Cables  
rmiell  Offline
Member
Joined: Nov 2000
Posts: 242
La Junta, Co. USA
Ron, what does NETA stand for? Do they have a web site?

Rick


#86851 - 01/05/04 02:05 PM Re: Insulation Test Using Megger On Cables  
tdhorne  Offline
Member
Joined: Mar 2001
Posts: 345
Maryland, USA
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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