Bathroom fan with timer

[5tan the man]

Whats the sequence of fitting a extractor fan with timer with regards to iso switch/fused spur/fan ?
I have gone for 3core n cpc from the ceiling rose to a 3pole iso switch, then 3core n cpc to supply side of fused spur, joining the permanent live and switched live ,then out from the load side to the fan with 3core n cpc splitting the two lives to corresponding terminals. Is this right ?

 

[dingledong]

building regs even with a window you still need a fan

 

[Guitarist]

This is an old debate, some of us fit fan isolators and some of us don't. Personally, I always fit an isolator for maintenance and convenience. However, there is no "requirement" that you fit one, just a recommendation, as the MCB can be used for isolation if needed. Building regs say that it is a good idea to fit one in a room with no window, but again, it's not a requirement (although many architects will specify it on new builds/extensions).

 

[Stig40]

IEE guide for electricians states: isolation required where bathroom as no window and supplied from lighting circuit. Which Building reg states otherwise?