Frequently Asked Questions about Miniature Circuit Breakers (MCB)

By April 1, 2021FAQs
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Miniature Circuit Breakers (MCB)

Looking for equivalent model for PLSM-C16, miniature circuit breaker (MCB)

Answer : 

You may consider this A9F84116, Schneider miniature circuit breaker (MCB).

Looking for miniature circuit breaker (MCB), 16A, 3P, and B Curve. For contactor, 25A and coil voltage is 24VDC.

Answer :

You may consider A9F73316 and LC1D25BD, Schneider Miniature Circuit Breaker (MCB).

What type of MCB should be used in domestic loads?

Answer : 

Type C will be the best for domestic loads.
Why should I use 16amp MCB for 11amp load why not 13amp MCB is used?

Answer :

MCB is the protection of human beings and electrical appliances from electrical shocks caused by current overload or short circuits. There is no 13A MCB, hence, 16A is the option.

How to differentiate between MCB and RCCB by looking at them?

Answer :

RCCB will have a test trip button while MCB doesn’t have it.

Does ELCB not have a test trip button?

Answer :

ELCB is the same as RCCB, hence, it will have a test trip button.
Does RCCB have to be equal or larger current rating with MCB? Does RCCB has to be before or after MCB? If so, how many poles does it have to be? 

Answer :

RCCB can be equal but you have to ensure the full load for the MCB(s) are lower than the RCCB when you power up. RCCB is always install before MCB. If your RCCB is 1-phase 2 poles, your MCB will be either 1 pole or 2 poles
RCCB does not protect from overload. If you put the MCB before a RCCB, you are facing a risk that there will no protection from small current leakage arising due to accidental touch by human being or insulation failure
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