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Originally posted by: lsuk
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?
I came across this posting on the IET wesite
Do any colleges teach people anything now a days.
Depending upon type of MCB then if earth fault current flowing through he MCB is greater then max permitted then MCB Trips.
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?
I came across this posting on the IET wesite
Do any colleges teach people anything now a days.
Depending upon type of MCB then if earth fault current flowing through he MCB is greater then max permitted then MCB Trips.