Bathroom Extractor Fan

[topman870]

Hi guys,

I'm in the process of replacing a bathroom shower fan with a powerful one which is mains powered 230v IPX4. Currently it's wired to its own switch so it doesn't come on with the lights which is the way I would like to keep it.

The new fan mention the below. The CU is RCD already so do I still need to add a separate RCD spur outside the bathroom or would standard extractor fan isolation be okay?

Description -
The fan requires a 230V 50Hz single phase supply, class II equipment (marked as stated in BS EN 60417). An external 3A fuse and a 30mA RCD is required for each fan unit.

Thanks

 

[terryplumb]

If the circuit that the fan is connected to is protected by an RCD ,you don't need another.
What amperage rating is the MCB that protects the circuit ? If it is 6 amp ,I can't see the point of introducing a 3 amp fuse.

 

[winston1]

More incorrect MI. The fuse is to protect the cable not the fan which should be internally protected. Any cable that requires 3amp protection would be too thin to use.

A separate RCD is not required per fan either.

 

[securespark]

0.5mm² flexible cable is not "too thin to use".

What on earth do you mean?

 

[topman870]

Yes the lights/fan are on a 6amp mcb just that it's hasn't got a isolation switch.

Would this be okay to add https://www.screwfix.com/p/lap-10ax-1-gang-3-pole-fan-isolator-switch-white/26196

 

[Taylortwocities]

Yes the lights/fan are on a 6amp mcb just that it's hasn't got a isolation switch.

Would this be okay to add https://www.screwfix.com/p/lap-10ax-1-gang-3-pole-fan-isolator-switch-white/26196

If you really must but there’s little point as
1. It isn’t a timer fan (!)
2. You’ve already got a separate switch that turns the fan on and off. Why on earth would you want another one?