instaling bathroom fan

[crewy]

Hi i've hit a spot of trouble and need your help. i had a bathroom fan which worked when the light came on. I wanted to change this to a fan to one which will work via a seperate pull cord. What i did was this......
I took the power from the nearby light to a 4 terminal junction box, twin and earth from the new celling pull cord to the junction box making sure the nutural was marked as switch live and put in a seperate space in the junction box and connected the live and earth as normal. From the junction box i put twin and earth connected to the switch live,live and earth to a fcu and from there to the fan. guess what it dosent work. Have i done this correctly? The power is off upstairs now and the wife isnt happy. I hope one of you guys are gonna read this and poss help soon.

cheers for any help

 

[ricicle]

Did the original fan run on after you turned off the light?

 

[bernardgreen]

"" From the junction box i put twin and earth connected to the switch live,live and earth to a fcu ""

Have you got a neutral going to the fan ?

 

[securespark]

There are two ways to wire a timer fan. The first is better by far.

Take a SL, L & N from the jb or rose to a 3 pole isolating switch, then out to the fan.

If you want to switch the light on without the fan, just switch the 3 pole off.

However, if you want the fan without the light, you will need another switch. Take a live/neutral feed to a pullcord. Take a 3 core to an 3 pole iso, and onto the fan, as above.

Take the live in (from supply) & live out (to iso) to the common. Take the switchwire (of the three core) to L1. Joint the N's & E's through.

The second way dispenses with the 3 pole iso:

Take the lighting feed in (and out) to the supply side of a switched fused spur.

Take the load side to a jb & wire to light, pullcord(s) & fan as normal.

 

[ricicle]

There are two ways to wire a timer fan. The first is better by far.

Take a SL, L & N from the jb or rose to a 3 pole isolating switch, then out to the fan.

If you want to switch the light on without the fan, just switch the 3 pole off.

However, if you want the fan without the light, you will need another switch. Take a live/neutral feed to a pullcord. Take a 3 core to an 3 pole iso, and onto the fan, as above.

Take the live in (from supply) & live out (to iso) to the common. Take the switchwire (of the three core) to L1. Joint the N's & E's through.

The second way dispenses with the 3 pole iso:

Take the lighting feed in (and out) to the supply side of a switched fused spur.

Take the load side to a jb & wire to light, pullcord(s) & fan as normal.

Blimey, have you been on the smarties Secure

 

[securespark]

Well, I had a few too many E's for lunch...

E110 Sunset Yellow, mainly......

 

[crewy]

The original fan did run on but it also only worked when the light was switched on, i wanted to do away with this! what i would like is for the fan to only run when i want it to.
im getting worried now, the fan i purchased from screwfix, worringly the box says axis eclipse x on one side and axis eclipse xt on the other. How would you guys wire this in from scratch, at least if i new i had done this correctly i could concentrate on the fan. I will try to connect L AND SL together in the fan as well.

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sorry didnt see your last post, any chance of a diagram buddy?

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What do you mean?Take the lighting feed in (and out) to the supply side of a switched fused spur. I get the in bit but where does the out go?

 

[securespark]

There are two distinct methods of wiring a fan in a bathroom. One uses a 3 pole isolator and the other (often used before 3P iso's were commonplace) meant taking what would be the loop to the bathroom wiring from the bathroom light and feeding a spur with it, then using the outgoing cable from the spur to feed the rose & fan.

So when I said feed in & feed out, I was talking about the live feed to the bathroom light fitting from the last light, and the feed from the bathroom fitting to the next light (if there is one).

 

[crewy]

cheers for that, ive now found that the fan in the box isnt the fan i had orderd even though the box said it was. This fan has a timer on it so i tried to join the SL and L in the fan like some other posts had said, that didnt work so i took a live from the junction box to the live in fan and it worked! I dont like it though, twin and earth to fan plus brown seperate live, decided to send fan back to screw fix and get new one without timer.