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#51066 - 04/20/05 11:18 AM Cycling of Tripped Circuit Breakers
iscb Offline
Junior Member
Registered: 04/20/05
Posts: 1
Loc: 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 04:02 PM Re: Cycling of Tripped Circuit Breakers
Bob Offline
Registered: 02/05/02
Posts: 182
Loc: Mobile, AL, USA
Its not in the code but the MFG should be able to advise you.
#51068 - 04/20/05 04:03 PM Re: Cycling of Tripped Circuit Breakers
e57 Offline
Registered: 05/27/03
Posts: 2876
Loc: S.F.,CA USA
A safe answer is once! Really, I don't know..... Good question!
Mark Heller
"Well - I oughta....." -Jackie Gleason
#51069 - 04/20/05 05:05 PM Re: Cycling of Tripped Circuit Breakers
Redsy Offline
Registered: 03/28/01
Posts: 2056
Loc: 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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