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new breaker required

dargoon · 2017-05-15 21:00:26

just had a service call to our Mira shower and afterwards the chap gave me a paper stating that the breaker in the MK c.u.was 40 and should be 45. I have no idea how to change it but it seems such a small but quick job for an electrician. Assuming I can get somebody any idea of the likely cost ( Thames Valley) tia.

Comments

Risteard Posts: 2,000 Forumite

17 May 2017 at 10:07PM

Ectophile wrote: »

A 40A breaker probably won't trip.

Actually, it's guaranteed not to trip. A circuit breaker to BS EN 60898 MUST NOT operate before 1.13 times its rated current, and must operate within 1 hour at 1.45 times. That said, it is wrong and non-compliant to fit an underrated circuit breaker and it may run hotter than intended.

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