Bathroom extractor fan

[sh4d0w]

Hi Guys,

I am after some advice / clarification with my bathroom extractor fan installation, I have two sparkie mates who both have over 30 years in the game and both own large firms etc so both have great credentials; I am being told two different things though. I have bought an EnviroVent 100mm Fan unit with Humidistat. I have recently lowered my bathroom celling (newly plastered) and fitted some 240v spots, One is telling me I need to chase up the wall (which “should” be 150mm deep, it will never be… maybe 50mm with some galvanised trunking) into the false celling and fish a 3core & earth to my first spot light and if I want it isolated (which I must to conform to building regs… Pfft) then another cable to an isolator, well I didn’t want to cut into the new celling so my options are to A) try and fish the cables from the spot holes Or B) smash down from the loft though the original ceiling and work from there.

My other mate is telling me the same BUT with another option… I can run a cable from my fan to the consumer unit, which is directly below my bathroom, and then from the consumer unit to my bathroom light switch were he can either A) change my 2 gang switch to a 3 gang and have my bathroom fan on its own circuit on the CU with an override switch on the wall OR B) same as above but add an iso switch rather than using the 3 gang.

I have already ran the cables from my fan to the consumer unit and from the wall switch to the consumer unit, I have also trunked and replasterd!

Do I NEED to redo this?

Thanks all.

 

[Risteard]

which “should” be 150mm deep

I would suggest that chasing the wall 6" deep is a terrible idea (for the wall as well as your arms).

 

[EFLImpudence]

I think you have misunderstood both of them.

 

[RF Lighting]

They're probably having you on for asking for their advice rather than employing them

 

[PrenticeBoyofDerry]

I think they may have meant you can route cables that are to be buried within the wall, within 150mm of the corner of where walls meet or within 150mm of where wall meets ceiling to conform to permitted safe cable routing.

The actual depth of chase cannot be more than 1/3rd of the walls leaf on the vertical chase and no greater than 1/6th on the horizontal chase. So unless your walls are about 900mm or more thick, you will be struggling to comply to building regs! (with regards to 150mm chase)

Untitled

• PrenticeBoyofDerry
• 16 Oct 2011
• 20

http://www.diynot.com/wiki/Electrics:fan