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Discuss How does a MCB work in the Commercial Electrical Advice area at ElectriciansForums.net

ian.settle1

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Originally posted by: lsuk

:rolleyes:I dont understand how the MCB's work, if you've got a fault live to earth somewhere down the line on a circuit, why does it trip off? how does it detect the fault via the MCB and trip?:rolleyes:

I came across this posting on the IET wesite :eek:

Do any colleges teach people anything now a days.:eek:

Depending upon type of MCB then if earth fault current flowing through he MCB is greater then max permitted then MCB Trips.:cool:
 
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