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#51066 - 04/20/05 02:18 PM Cycling of Tripped Circuit Breakers  
iscb  Offline
Junior Member
Joined: Apr 2005
Posts: 1
Orlando, Fl, USA
Is there any code, standard, reference, or documentation that states how many times a circuit breaker can be cycled safely after it has tripped? Also, are there a set number of times a circuit breaker can trip before its overcurrent properties begin to degrade?


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#51067 - 04/20/05 07:02 PM Re: Cycling of Tripped Circuit Breakers  
Bob  Offline
Member
Joined: Feb 2002
Posts: 182
Mobile, AL, USA
Its not in the code but the MFG should be able to advise you.


#51068 - 04/20/05 07:03 PM Re: Cycling of Tripped Circuit Breakers  
e57  Offline
Member
Joined: May 2003
Posts: 2,876
S.F.,CA USA
A safe answer is once! Really, I don't know..... Good question!


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#51069 - 04/20/05 08:05 PM Re: Cycling of Tripped Circuit Breakers  
Redsy  Offline
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Joined: Mar 2001
Posts: 2,056
Bucks County PA
I guess it depends on if the CB opened on overload or on short circuit.
Some larger CBs are expensive, and assuming the internals are compromised after one or two overcurrent conditions could get expensive.
There are companies that test CBs.
Maybe that would be the way to go if you are talking about larger commercial / industrial systems.

It is a good question.



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