11:28 AM, 13th April 2021, About 3 years ago 23
The electrician who recently did an EICR for my property found the installation “Unsatisfactory”, one of the reasons being that the shower circuit (6mm twin and earth) is overrated with a 40A overcurrent device.
In 2017 I had a new 18th edition consumer unit installed and that electrician provided a complete Domestic Electrical Installation Certificate valid for 5 years to the next inspection. This work was done about a month after installing a new 8.5kW electric shower, and there have not been any electrical issues since – until this EICR. I believe that the 8.5kW shower draws 37amps while a 6mm cable’s capacity depends on how it’s installed and the length of the run, in this case, less than 9m.
Obviously, I don’t want to have to change the cable or the shower, which have been fine for the 4 years since the shower was installed, but if he changes it from a 40A MCB to a 32A MCB I’m concerned the shower will keep tripping that. Advice from our Landlord electricians would be much appreciated.
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