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How to prove an MCB functions correctly?

Paul Brewerton
Is there any way of proving that an old Crabtree C50 MCB functions correctly?

Modern equipment comes with certificate of conformity and is traceable, but we are having to use an old breaker in an old board, and would like some confidence that it is actually fit for purpose.

TIA
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    Something I come across a lot. Whether it is a Crabtree C50 or some obsolete MCB from Ottermill, Federal Electric, Wylex or the like. Something of that vintage is usually better built than some of the modern stuff but I do wonder how, given its age, how it might perform when suddenly called in to action. If there was a test that was easily conducted how would you know that the device remained good after the vagaries of the test. C50s in a board in an old engineering shed might be a while world away from C50s in a board in a multi-million Pound building!
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  • 0
    Something I come across a lot. Whether it is a Crabtree C50 or some obsolete MCB from Ottermill, Federal Electric, Wylex or the like. Something of that vintage is usually better built than some of the modern stuff but I do wonder how, given its age, how it might perform when suddenly called in to action. If there was a test that was easily conducted how would you know that the device remained good after the vagaries of the test. C50s in a board in an old engineering shed might be a while world away from C50s in a board in a multi-million Pound building!
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