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Discuss wiring extractor fan to shower switch in the Electrical Wiring, Theories and Regulations area at ElectriciansForums.net

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deb0and

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Hi

Can an extractor fan be wired so when i pull my cord to turn power on for the shower the fan automatically comes on as well?

I was going to just cut the shower connection and put a junction box in then wire the fan into that, would this be OK?

Cheers
 
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ezzzekiel

  • Thread Starter Thread Starter
  • #2
Come from light using 3core to isolator you need a permanent live and switched live
 
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bahco

  • Thread Starter Thread Starter
  • #3
like ezzzekiel said it can be done by taking a 3c+e cable from your light fitting in the bathroom to a tp fan isolator then to your fan.

please do not cut your shower cable and do the way you said its not right!

saying all this doing work in a bathroom is notifiable work.
 
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salisbury spark

  • Thread Starter Thread Starter
  • #4
Agree with last post. - fan/timer wont work properly without permanent live to fan and a switched live which you wont have from shower. As you need the switched live forget going through shower cable, for dozens of reasons. - Can elaborate if needed (safety/fire etc. etc....)
 
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deb0and

  • Thread Starter Thread Starter
  • #5
notifiable work? To who?

I was wanting to go from the shower because in the summer i am not going to need to put the light on to take a shower. I was also hoping i wouldnt need another pull down cord for the fan as i have two alerady, 1 for the light and one for the shower.

So i can just cut the add a spur off from the lighting cable and wire in the fan through a junction box?

Never thought there would be a problem going from the shower cable.

good job i asked, i was just about to get cutting
 
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Spudnik

  • Thread Starter Thread Starter
  • #6
Notifiable to your local council

Part P of the building regs state this.

They charge anything from £100 plus for the service, so you ideally should get an electrician to do this work for you a, if he is registered, it doesnt cost as much for him to notify.



Therefore its not a good idea to start messing with a 32A shower cable to supply an extractor.

If you are simply replacing a fan thats already there then there are humidistat version available that only operate when the room steams up.

EG:

4 Inch Humidity Wall Extractor Fan

Not cheap but better than messing with circuit cables that are not suitable for the job.
 
Last edited by a moderator:
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salisbury spark

  • Thread Starter Thread Starter
  • #8
Look at the wiring for a bathroom fan on the internet. - If you have a timer on your fan you need to have isolation for maintenance. This must be more than just switching off the mcb in the fuse box. This is because when you switch the fan off at the pull cord,there is still a permanent live wire connected to the fan for the timer. Breaking into a high current carrying cable with a junction box introduces more potential problems. Please get an electrician to advise as im worried you cant see all the potential problems - for the people using the bathroom and more importantly the Electrician in future who may have to sort it out.....
 
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deb0and

  • Thread Starter Thread Starter
  • #9
how much would an electrician charge for wiring in an extractor fan? Credit crunch n all, this is why i was going to do it myself but reading the replies me thinks it aint such a good idea.
 
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Tiger

  • Thread Starter Thread Starter
  • #10
you may want to look at pir extractor fans if your worried about them not coming on in the summer with no lights. then it will come on every time someone comes into the room.

Definately get someone in mate it's dangerous
 
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DAVID ADDIS

  • Thread Starter Thread Starter
  • #11
hI DOES THE FAN WORK IF I CONNECT TO THE SHOWER SYSTEM AND HOW PLEASE ALSO IS IT TO BUILDING REGS REGARDS DJA.
 

ringer

-
Arms
What you are proposing to do is wrong in many respects. Have you actually read the previous posts on this thread?
 
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robsparky1975

  • Thread Starter Thread Starter
  • #13
Any work in a bathroom is notifiable under part p of the building regulations,except if replacing like for like equiptment,so alterations to any wiring must be notified,being it a special location and all,also any alteration must conform to the new 17th edition regualtions,so wire in a new fan etc,must be on rcd or bonding all in place(16th edition).
 
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robsparky1975

  • Thread Starter Thread Starter
  • #14
Please,please,please use a qualified electrician,i have seen what a faulty bahroom fan can do,melted,fire,next door to a 9 month old babys bedroom,because the person who wired it was not qualified,no earth to fan or in any part of bathroom,very old wiring which didnt have an earth in it,so whoever fitted it had broken the law and almost killed someone,we as electricians are trained proffesionals and yes we need to make a living,but we also want to keep people safe from the dangers of electric shock and fire,and part p of the building regs was introduced to keep people safe from the sort of thing i mentioned,i hope this explains it a little clearer,and you would be suprised how friendly us electricians can be,if you cant afford it all most will work something out for you.
 
By the way, only a minor works will be required and therefore is NOT notifiable as you are only extending an existing circuit.

I fully wire loft conversions tapping into existing ring and lighting circuits and building control are happy with minor works certificates.
:confused::confused::eek:
 

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