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#42439 - 09/20/04 08:36 PM Murray Panels  
wiremann-54270  Offline
Junior Member
Joined: Jan 2004
Posts: 9
Lebanon, PA USA
Just got back from a service call. H.O. had a 100amp Murray panel that was half under water this weekend, but main never tripped. In my mind it should have , as both bussbars were shorted together. Am I missing something here, or is Murray not as good as I once thought?


Patrick

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#42440 - 09/20/04 10:53 PM Re: Murray Panels  
Electric Eagle  Offline
Member
Joined: Apr 2002
Posts: 914
Alpharetta, GA
Quote
Am I missing something here, or is Murray not as good as I once thought?


I guess it depends on how good you thought Murray once was. I never thought it was any good. It is now part of Seimens, which is German for crap. We had a 20 amp Seimens breaker with a dead short on it, it would buzz for several seconds until the Cutler Hammer(CH line) 200 amp main would trip.


#42441 - 09/20/04 11:11 PM Re: Murray Panels  
wiremann-54270  Offline
Junior Member
Joined: Jan 2004
Posts: 9
Lebanon, PA USA
I never thought Murray was that great, but good for lower end equipment. So maybe I should suggest to the owners that I replace their panel with something else, like a Suquare D QO ? I still say the main should have tripped. That's the main thing. Now that I've had my hands in this liability is a concern. I have a goodly ammount of insurance, I just don't want to have to use it.


Patrick

#42442 - 09/20/04 11:23 PM Re: Murray Panels  
PCBelarge  Offline
Member
Joined: Jun 2003
Posts: 681
Dobbs Ferry, NY, USA
Don't blame the quality of the equipment for the overcurrent device not opening.

Water is not a good conductor of itself. If the water around that panel was pretty clean, then you can expect the device to not open.

Nema has a good document on their website dealing with water damaged equipment. www.nema.org then try the search for water damaged equipment.

Pierre


Pierre Belarge

#42443 - 09/20/04 11:23 PM Re: Murray Panels  
Jim M  Offline
Member
Joined: Aug 2001
Posts: 457
Chestertown, MD, USA
Please also see the post titled "panel under water". This may give you a better idea of what you are dealing with.


#42444 - 09/20/04 11:52 PM Re: Murray Panels  
Edward  Offline
Member
Joined: Dec 2002
Posts: 308
California
in in basic operation.
If there is not enough current flow then the OCPD will not open.
If the OCPD is not opening that does not mean it is a bad equipment. It might simply be that there is not enought current to activate the OCPD.

That is my understanding.

Edward


Thanks
Edward

#42445 - 09/21/04 03:08 PM Re: Murray Panels  
SJT  Offline
Member
Joined: Jul 2002
Posts: 241
PATCHOGUE, N.Y.
I think the breaker sees the water as a load, and not a direct short. I've been using Murray for a long time, with no problems. They've re-designed the panels. In industrial work, we use GE bolt on style breakers, and panels. How did the water get there? Water main or flood?


#42446 - 09/21/04 03:15 PM Re: Murray Panels  
wiremann-54270  Offline
Junior Member
Joined: Jan 2004
Posts: 9
Lebanon, PA USA
It was compliments of Ivan. A lot of things flooded here in PA. I just moved my office to my basement. I'm glad I checked it Saturday morning. My new computer was almost afloat.


Patrick


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