Cooker MCB/RCD

Grumps · 2018-12-15T09:20:40+00:00

HiFather-in-Law had a new NEFF oven installed by John Lewis. Their installers said that the MCB needed changing to a 32A part. The electrician called and checked the wiring and swapped the MCB. He said that the method the JL installers had used to connect wasn't great; ideally the copper wires should be wrapped around the screw terminals.The problem is, that when the oven is switched off, sometimes the RCD trips. FIL just says "the fuse blows", but other circuits are also affected - hence I'm guessing he means the RCD.The NEFF engineer turned up and took a look at the consumer unit and said "You need a class A fuse. You've got a class B". They're my FIL's words.So, can anyone decipher this and say what needs changing and why?Can you even get a class/type A MCB? Why would changing the RCD type from B to A make a difference?Thanks, and a Merry Christmas!

Dec 15, 2018 Last reply: 7 years ago 60 Replies

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Adam Funk 7 years ago

That all sounds plausible; thanks.

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Cooker MCB/RCD

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