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#73084 - 12/16/06 12:04 AM Hot!! Please take notice os a SqD General Duty Safety switch recall  
Dave T  Offline
Member
Joined: Jan 2005
Posts: 155
Waukesha, WI, USA
Please go to this recently released recall notice regarding a Square D Recalls Safety Switches Due to Shock or Electrocution Hazard. http://www.cpsc.gov/cpscpub/prerel/prhtml07/07062.html


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#73085 - 12/19/06 01:21 AM Re: Hot!! Please take notice os a SqD General Duty Safety switch recall  
Rich Thomas  Offline
Member
Joined: Mar 2005
Posts: 48
Seattle, Washington, USA
This information is very interesting.

One of my company's clients specifies Square D safety switches exclusively (i.e., no substitutions.) However, their spec calls for Heavy Duty. I noticed the recall are for Standard Duty. I wonder what the difference is?

Thanks for this article.


#73086 - 12/19/06 12:45 PM Re: Hot!! Please take notice os a SqD General Duty Safety switch recall  
SolarPowered  Offline
Member
Joined: Jul 2004
Posts: 625
Palo Alto, CA, USA
One wonders what you can possibly do to a knife switch to make it fail to open.


#73087 - 12/19/06 02:08 PM Re: Hot!! Please take notice os a SqD General Duty Safety switch recall  
JBD  Offline
Member
Joined: Jul 2001
Posts: 599
WI, USA
There are major differences between Square D general/standard duty and heavy duty switches. I don't think the 30A ones have any parts in common at all. The heavy duty units are designed for 600V applications (even if they have 250V fuse spacing). The general duty units are designed for 250V max.


#73088 - 12/19/06 10:30 PM Re: Hot!! Please take notice os a SqD General Duty Safety switch recall  
mxslick  Offline
Member
Joined: Oct 2004
Posts: 803
Atomic City, ID USA
Quote
One wonders what you can possibly do to a knife switch to make it fail to open.



Just a shot it the dark..maybe the plastic "clips" that move the contact blades break, leaving the blade fully or partially closed?

Once again, just like the Xmas light recall, they don't give any details of what the bloody problem is caused by!! Very annoying.

edited to add link



[This message has been edited by mxslick (edited 12-19-2006).]


Stupid should be painful.

#73089 - 12/19/06 10:55 PM Re: Hot!! Please take notice os a SqD General Duty Safety switch recall  
BigB  Offline
Member
Joined: Mar 2004
Posts: 719
Tucson, AZ USA
I had a landlord report that a whole apartment "shorted out" when he tried to close the knife switch. When I got there I found the insulating part of the throw lever had broken off and when he tried to close it the metal handle came into contact with the blades, that were still stuck in the slots on the line side. Made quite a boom he said. The switch was actually closed anyway, the problem was a blown fuse.



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