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Old 02-12-2009, 03:10 PM   #61
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Unfused connectors MELTED House wires WHAT TO DO???


Hello, You seem to know about megging circuits. I have an Amprobe 45 digital meggar and I have to meg a house that was hit with high voltage. a 4800 volt utility line came down and hit the messenger line to the home. Several wires burned up and of course it melted the electrical panel. I want to meg the branch circuit wiring in the home that I cant see behind the walls and ceilings. I know I have to perform the meg test but I am a little unsure on how to actually use the megger correctly.

I know I have to disconnect everything in the house and turn on light switches and remove bulbs. Do I disconnect all of the grounds and neutrals from the panel and then connect the leads to hot-neutral, than neutral-ground, then hot-ground wire. Do I then send 1000 volts setting on meggar through the wiring. I am lost at what a good ohm reading should be. Can you help me figure this out?

Thanks

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Old 02-12-2009, 04:17 PM   #62
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Unfused connectors MELTED House wires WHAT TO DO???


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Originally Posted by hastime View Post
Hello, You seem to know about megging circuits. I have an Amprobe 45 digital meggar and I have to meg a house that was hit with high voltage. a 4800 volt utility line came down and hit the messenger line to the home. Several wires burned up and of course it melted the electrical panel. I want to meg the branch circuit wiring in the home that I cant see behind the walls and ceilings. I know I have to perform the meg test but I am a little unsure on how to actually use the megger correctly.

I know I have to disconnect everything in the house and turn on light switches and remove bulbs. Do I disconnect all of the grounds and neutrals from the panel and then connect the leads to hot-neutral, than neutral-ground, then hot-ground wire. Do I then send 1000 volts setting on meggar through the wiring. I am lost at what a good ohm reading should be. Can you help me figure this out?

Thanks
If you don't know how to use it, why would you be using in someone's house?
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Old 02-12-2009, 05:25 PM   #63
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Unfused connectors MELTED House wires WHAT TO DO???


I know how to use it but am unsure what the readings should be, it is not in milliamps but OHMS. Everybody has a different opinion on the correct way to test the integrity of the romex. I was looking for an explanation to make sure I do it correctly.
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Old 02-12-2009, 06:01 PM   #64
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Unfused connectors MELTED House wires WHAT TO DO???


WOW, glad no-one was hurt
I use a rubber pad across the main lugs when I'm in the panel
Covers them completely, I was thinking it was just being overcautious
Now I know its a good thing

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