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#28266 - 08/15/03 11:49 AM Opening switch under load?  
Redsy  Offline
Member
Joined: Mar 2001
Posts: 2,056
Bucks County PA
Several times, people have expressed concern about occasionally (especially in an emergency)opening a feeder circuit breaker or an equipment disconnect switch under load.
As long as it is properly rated, and it is not an isolation switch, I don't see why there should be any problem.
Your thoughts, please?


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#28267 - 08/15/03 01:51 PM Re: Opening switch under load?  
wolfdog  Offline
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Joined: Oct 2001
Posts: 135
Dallas,TX
I had a similar discussion on an air conditioning web site.
Disconnects for a/c and motor equipment are horsepower rated and sized accordingly to allow for disconnect operation under load.

[This message has been edited by wolfdog (edited 08-15-2003).]


#28268 - 08/15/03 04:55 PM Re: Opening switch under load?  
pauluk  Offline
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Joined: Aug 2001
Posts: 7,520
Norfolk, England
And wouldn't an HP-rated disconnect also be designed to break the load of a stalled motor?



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