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#86167 - 09/19/03 09:36 PM Murray Panelboards & Classified Breakers  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,875
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 11:14 AM Re: Murray Panelboards & Classified Breakers  
PCBelarge  Offline
Member
Joined: Jun 2003
Posts: 681
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


Pierre Belarge

#86169 - 09/20/03 02:53 PM Re: Murray Panelboards & Classified Breakers  
resqcapt19  Offline
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Joined: Nov 2000
Posts: 2,148
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


Don(resqcapt19)

#86170 - 09/20/03 03:28 PM Re: Murray Panelboards & Classified Breakers  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,875
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


#86171 - 09/20/03 06:06 PM Re: Murray Panelboards & Classified Breakers  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,303
breakergate again?


#86172 - 09/20/03 06:13 PM Re: Murray Panelboards & Classified Breakers  
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
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)

#86173 - 09/20/03 07:53 PM Re: Murray Panelboards & Classified Breakers  
Scott35  Offline

Broom Pusher and
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Anaheim, CA. USA
Quote
breakergate again?


Breakergate...LOL!!! [Linked Image] [Linked Image] [Linked Image] [Linked Image]

Scott35


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

#86174 - 09/20/03 08:47 PM Re: Murray Panelboards & Classified Breakers  
Bill Addiss  Offline
Member
Joined: Oct 2000
Posts: 3,875
NY, USA
Here is the last memo (from 2001) that was passed around about this:

[Linked Image]


#86175 - 09/20/03 09:43 PM Re: Murray Panelboards & Classified Breakers  
resqcapt19  Offline
Member
Joined: Nov 2000
Posts: 2,148
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


Don(resqcapt19)

#86176 - 09/22/03 08:11 PM Re: Murray Panelboards & Classified Breakers  
sparky  Offline
Member
Joined: Oct 2000
Posts: 5,303
conversely FPE fires continued to have our monitoring agencies backpeddle ,despite being installed via listed instructions....


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