Electrician Advice

hollie.weimeraner

I had a bathroom refurbed 5 years ago and at the time we had an integrated shower light and extractor fan fitted.
Anyway 5 years later the extractor has failed and I have replaced it.
The issue is the initial fan (and the replacement) should have had an inline 3 amp fuse fitted as protection. I found this out whilst reading the installation instructions and have also researched electrician forums where not fitting the fuse and relying on the mcb in the lighting circuit is a definite do not do.
Just wondering if anyone has any advice on how to approach the original plumber to try and get the issue rectified. I am happy to fit the fan myself but not the fuse as it needs part p certification

Risteard

Although the manufacturer's instructions will demand it the fuse is simply to protect the cable and will offer no extra protection to a fan installed on a lighting circuit. If the fan needs fusing for internal components then it's the manufacturer's responsibility to fit it - certainly a BS1362 fuse won't provide it.

Geoff1963

The wire to the fan will be so thin, that a short-circuit there, probably won't trip the MCB, hence the need for a small, dedicated fuse. If the motor jams, that might blow the fuse, but gradually clogging with dirt will probably just make it overheat, needing an internal thermal fuse ; which is probably why the original doesn't work.

So tell he plumber that it needed the fuse to protect his wire.
Perhaps start, "I've noticed something you can maybe help me with . . ."

tacpot12

If the light/fan are fed from the ceiling void, you don't need part P approval if you fit the fuse in the ceiling void. Only electrical work inside the bathroom needs to approved under part P.