I need to wire up a bathroom fan in my house, I want it to come on when I switch the lights on, and it is designed to stay on 10 mins or so after the light is switched off.
At the light I have 3 wires live neutral and earth is it just a case of wireing these up into a junction box and and the taking a new length of wire to the fan and to the light if this is so it is simple and I could easily do this myself but, on the connection to the fan I have 4 inputs i:e L N E and another one SL, what wire goes into this I know its a switched live but I think this may only be needed if I wire the fan up to come on with its own switch and not the lightswitch.

You will need,

A permanent live for L (Needed for your timed over run)

A Switch live for your SL.

A Neutral and earth.

Is the fan a 240V unit or is it supplied via a transformer?

Just make sure it is suitable for the bathroom zone you are puttng it into.

Of course you are just replacing an existing fan with regards to Part P.


I need to wire up a bathroom fan in my house, I want it to come on when I switch the lights on, and it is designed to stay on 10 mins or so after the light is switched off.
At the light I have 3 wires live neutral and earth is it just a case of wireing these up into a junction box and and the taking a new length of wire to the fan and to the light if this is so it is simple and I could easily do this myself but, on the connection to the fan I have 4 inputs i:e L N E and another one SL, what wire goes into this I know its a switched live but I think this may only be needed if I wire the fan up to come on with its own switch and not the lightswitch.

Its a 240v and a new install I have got the fan in situ it just needs wireing up, There was supposed to be an electrician calling last weekend to do the job but he never showed and I can`t get hold of him this morning.
So where do I get this feed for the permanant live, switched live neutral and earth is from the ceiling rose I assume.

Read this page regarding zones in bathrooms. Then check your fan to see if it's suitable.
Using electricity in the Bathroom or Shower Room- UK rules and regulations (http://www.diydata.com/electrics/bathroom_electrics/bathroom_electrics.htm)

But also be aware that it's a criminal offence to do this work yourself.
Click Here To See Why (http://www.iee.org/Publish/WireRegs/BR-PartP-dwellings.cfm#Q1)

The fan is suitable for bathrooms and the motor is fitted in a different room anyway i:e the attic, it is then extracted out under the eaves so I`m ok on that one. As for part P I know about that rule, the electrician that was/is supposed to do it for me is a relative and his father my cousin who sadly died earlier this year used to help me with all my electrical instalations, he would be offended to charge me any money for doing jobs so he used to give me detailed instuctions on how to do the job myself, thus saving myself some cash along the way.

:) So long as you're aware of the situation.
All of the connections you need can usually be found in the ceiling rose. But you should also go via a fan isolator just outside the bathroom.

L - Taken from the 'Loop' terminal of the rose
N - Taken from the 'N' terminal of the rose
Earth - taken from the Earth terminal of the rose
SW/L - Taken from the 'L' terminal of the rose.

Go from the rose with some 3 core and earth, to a fan isolator just outside the bathroom.
then on the switched side of the isolator go to the fan.

The Brown cable should be used as the permanent live (Loop/L)
The Black cable should be used as the Sw/L and sleeved or taped brown
The Grey Cable should be used as the neutral and sleeved or taped blue
The Earth is the remaining cable, and must be sleeved in Green/Yellow

There should be a permanent live either tucked up above the bathroom light in the loft space or tucked up above the pull switch.

It will probably be in a connector block so turn the circuit off if you decide to fish for it.

Its a 240v and a new install I have got the fan in situ it just needs wireing up, There was supposed to be an electrician calling last weekend to do the job but he never showed and I can`t get hold of him this morning.
So where do I get this feed for the permanant live, switched live neutral and earth is from the ceiling rose I assume.

The lighting is not on a loop circuit I have a box where all the lighting upstairs is conected from, I have in the past wired up a light with a switch for the lighting in the attic from this box, the downstairs lighting also has its own box. The ceiling rose in the bathroom has a red, black and eath wire the pull cord has two red wires and an earth. I take it I must use a live from the box on the landing.

You need to wire up from either the ceiling rose and pick up the unswitched live from the switch or the box on the landing, or wire it from the switch and pick up a neural from the rose or ththe box on the landing.

John.

In that case, all you need will be in that junction box.
You'll have the permanent feed, switch wire, neutral, and CPC (Earth).

Read this page regarding zones in bathrooms. Then check your fan to see if it's suitable.
Using electricity in the Bathroom or Shower Room- UK rules and regulations (http://www.diydata.com/electrics/bathroom_electrics/bathroom_electrics.htm)

But also be aware that it's a criminal offence to do this work yourself.
Click Here To See Why (http://www.iee.org/Publish/WireRegs/BR-PartP-dwellings.cfm#Q1)

From 1 January 2005 it is a legal requirement for all work on fixed electrical installations in dwellings and associated buildings to comply with relevant standards.

Some DIY work will require the submission of a building notice to the local authority and the payment of a building control fee.

so it isn't illegal to do the work yourself?

All done and dusted and more importantly working.

so it isn't illegal to do the work yourself?

Any electrical work done should be tested by a competent person to ensure that basic things like, Earth Continuity, Ring Continuity (Where applicable), Insulation Resistance, and Earth Fault Loop Impedence are adequate.

That said however, I can't find a piece of literature that states you MUST have it tested. But you really can't take it for granted that just because it works, it's safe. It only takes one little snapped piece of cable to turn a safe installation, into an unsafe one.

This is where Part P falls on it's ass. Nice idea, badly executed:rolleyes:

This is where Part P falls on it's ass. Nice idea, badly executed:rolleyes:

Fits right in with most of the other legislation passed in the last few years then. :rolleyes:

John.

Fits right in with most of the other legislation passed in the last few years then. :rolleyes:

John.


Obviously you need to proove that it was done prior to Jan 2005 ;)

So don't use that brown and blue twin and earth :norty:

Not that I condone it, just it's half arsed regs that just affects the good people and their businesses, but does diddly squat for anyone who doesn't care about them (i.e cowboys).

Exactly. We have to fork out extra money each year so that we can self certify. But mr handyman can bodge all he likes, because no ****er's gonna find out until someone dies.
Then there's the promise of sellers packs, so maybe the money forked out each year might be worth it because of the extra work.
But no, they abandon that idea, so we're basically forking out extra money, for no real benefit.

I think home insurance companies may help with regards to the home sellers pack and the governments lack of back bone.

If there is a way of not paying out the insurance companies will use it.

So future home owners may find them selves seriously out of pocket if they cannot produce a recognised test certificate.

I'm hopeing this is the case anyway.


Exactly. We have to fork out extra money each year so that we can self certify. But mr handyman can bodge all he likes, because no ****er's gonna find out until someone dies.
Then there's the promise of sellers packs, so maybe the money forked out each year might be worth it because of the extra work.
But no, they abandon that idea, so we're basically forking out extra money, for no real benefit.

That is our last hope. But in my experience most 'would be' clients see straight past future difficulties, and concentrate more on the price in front of them at the time.:wonder:

As a sparky myself i can tell you that it is against the law to do your own wiring in you home now.. next year they are bringing in another law that all house must have a certificate to show the house is safe. without one you will not be able to sell your home and some house insurance companys will want a copy to.

I think you will find that the government has backed down with regards to the sellers pack and it will not now be a requirement to produce a periodic electrical installation certificate.

Home Information Pack (http://www.homeinformationpacks.gov.uk/hip_content.aspx)

As a sparky myself i can tell you that it is against the law to do your own wiring in you home now.. next year they are bringing in another law that all house must have a certificate to show the house is safe. without one you will not be able to sell your home and some house insurance companys will want a copy to.