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Characteristics of Type B and Type C MCBs for motor circuit.

Alan B

From my reading and pervious discussions on this forum my understanding is that for very short term overloads the tripping characteristic for type B and type C devices is the same.

i was then thinking why do LED manufacturers recommend type C protective devices due to inrush current, which I would assume is very short term.

The reason I am asking the question is that I am wiring up a large compressor which requires a 32A circuit breaker (don't have access to the instructions at the moment). My plan was to use a type C device because of in rush currents, but struggling to get hold of one.

If the difference between type B and type C MCB's/ RCBO's  is only for longer term overloads would using a type C device actually make any difference and am I wasting my time trying to get hold of one.

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    After a bit more research I am less confident I am going to get the part quickly. May have to persuade the customer that he is going to have to replace the bargain basement board he bought. Hopefully I am being over pessimistic.

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    After a bit more research I am less confident I am going to get the part quickly. May have to persuade the customer that he is going to have to replace the bargain basement board he bought. Hopefully I am being over pessimistic.

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