I have ordered a replacement MCB to be posted to the customers home from Screwfix, because in addition to being rated at 32 amps it was not a original equipment manufacturer device being   a MCG MCB in a Chint consumer unit with the busbar pin cut down to get it onto the busbar and the slots don’t really line up. So when other remedial work is done if I don’t get back the customer will have the correct device ready for whoever turns up to install on a spare untouched pin.

So in this particular instance the job just wasn’t good enough, but I see some really good installations installed in a really professional manner by electricians who use a 32 amp protective device for a 8.5 kW shower overloading it by around 20% which stresses the MCB and overheats the MCB and the adjoining devices.

I cannot get a grip on their rationale.

I have ordered a replacement MCB to be posted to the customers home from Screwfix, because in addition to being rated at 32 amps it was not a original equipment manufacturer device being   a MCG MCB in a Chint consumer unit with the busbar pin cut down to get it onto the busbar and the slots don’t really line up. So when other remedial work is done if I don’t get back the customer will have the correct device ready for whoever turns up to install on a spare untouched pin.

So in this particular instance the job just wasn’t good enough, but I see some really good installations installed in a really professional manner by electricians who use a 32 amp protective device for a 8.5 kW shower overloading it by around 20% which stresses the MCB and overheats the MCB and the adjoining devices.

I cannot get a grip on their rationale.