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#86167 - 09/19/03 06:36 PM Murray Panelboards & Classified Breakers
Bill Addiss Offline
Member

Registered: 10/07/00
Posts: 4196
Loc: NY, USA
I just wanted to mention that I recently heard that Murray has somehow redesigned their Panelboards and claim that other breakers tested and classified for use in the older panels can not be used in newer Murray Panels.

Has anyone else heard this?

Bill

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#86168 - 09/20/03 08:14 AM Re: Murray Panelboards & Classified Breakers
PCBelarge Offline
Member

Registered: 06/08/03
Posts: 657
Loc: Dobbs Ferry, NY, USA
Hello Bill

This is a very interesting situation. I myself am a little confused over this issue, because of conflicting info that is available.
I have some info in my office, I am at home, that I will dig up later about this. I will say that I have spoke to both UL and individual manufacturers about this subject and I cannot do justice to this subject until I get the info from my office.

Pierre
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Pierre Belarge

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#86169 - 09/20/03 11:53 AM Re: Murray Panelboards & Classified Breakers
resqcapt19 Offline
Member

Registered: 11/10/00
Posts: 2209
Loc: IL
Bill,
If Murray has redesigned the bus in their panels, then neither the listed nor classified breakers made for the older panels would be permitted to be used in the new panel. If they made a big enough change to be able to patent the new bus and breaker design, they will be able to prevent any one from making "classified" breakers that fit the new panel. I believe this is exactly what happened with the Square D QO breakers. That bus design is unique and was patented by Square D. There were no third party breakers available for that panel for many years. Now there are "classified" breakers that can be used in the Square D QO panels. I assume that this is because the patent has expired.
Don
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Don(resqcapt19)

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#86170 - 09/20/03 12:28 PM Re: Murray Panelboards & Classified Breakers
Bill Addiss Offline
Member

Registered: 10/07/00
Posts: 4196
Loc: NY, USA
Pierre,

Thanks, I look forward to seeing what you have come up with on this issue, it is very confusing.

Don,

I don't know specific details but heard that an official letter/memo would be coming out from them about it.

Bill

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#86171 - 09/20/03 03:06 PM Re: Murray Panelboards & Classified Breakers
sparky Offline
Member

Registered: 10/18/00
Posts: 5545
breakergate again?

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#86172 - 09/20/03 03:13 PM Re: Murray Panelboards & Classified Breakers
resqcapt19 Offline
Member

Registered: 11/10/00
Posts: 2209
Loc: IL
This issue of "classified breakers" is one of the reasons that I believe that 110.3(B) only applies to the information in the actual "listing and labeling" and does not include "manufacturer's instructions" as all manufacturers state that you can only use their breakers in their panels>
Don
_________________________
Don(resqcapt19)

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#86173 - 09/20/03 04:53 PM Re: Murray Panelboards & Classified Breakers
Scott35 Offline

Broom Pusher and
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Registered: 10/19/00
Posts: 2724
Loc: Anaheim, CA. USA
 Quote:
breakergate again?


Breakergate...LOL!!!

Scott35
_________________________
Scott " 35 " Thompson
Just Say NO To Green Eggs And Ham!

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#86174 - 09/20/03 05:47 PM Re: Murray Panelboards & Classified Breakers
Bill Addiss Offline
Member

Registered: 10/07/00
Posts: 4196
Loc: NY, USA
Here is the last memo (from 2001) that was passed around about this:


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#86175 - 09/20/03 06:43 PM Re: Murray Panelboards & Classified Breakers
resqcapt19 Offline
Member

Registered: 11/10/00
Posts: 2209
Loc: IL
All of the breaker manufactures have published statements like that. Yes, they may be able to void the warranty, but that does not make the use of "classified" breakers a code violation. The "warranty" issue is a legal one, but I have been told that it can be voided if a contractor installs the classified breaker, but not if the end user of the panel installs the "classified" breaker. (is our resident attorney still around?) This is a perfect example of a "manufacturer's instruction" that 110.3(B) does not require you to follow.
Don
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Don(resqcapt19)

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#86176 - 09/22/03 05:11 PM Re: Murray Panelboards & Classified Breakers
sparky Offline
Member

Registered: 10/18/00
Posts: 5545
conversely FPE fires continued to have our monitoring agencies backpeddle ,despite being installed via listed instructions....

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