• Welcome to the ShrimperZone forums.
    You are currently viewing our boards as a guest which only gives you limited access.

    Existing Users:.
    Please log-in using your existing username and password. If you have any problems, please see below.

    New Users:
    Join our free community now and gain access to post topics, communicate privately with other members, respond to polls, upload content and access many other special features. Registration is fast, simple and free. Click here to join.

    Fans from other clubs
    We welcome and appreciate supporters from other clubs who wish to engage in sensible discussion. Please feel free to join as above but understand that this is a moderated site and those who cannot play nicely will be quickly removed.

    Assistance Required
    For help with the registration process or accessing your account, please send a note using the Contact us link in the footer, please include your account name. We can then provide you with a new password and verification to get you on the site.

Electrical advice

steveo

mine to stay the same please
Joined
Aug 30, 2005
Messages
7,545
I've got a switch in an ensuite that turns the lights and extractor fan on together. Is it easy to install a seperate switch so the work independently?
 

davewebbsbrain

Webby⭐
Joined
Aug 17, 2005
Messages
22,512
Location
Eastwood
I've got a switch in an ensuite that turns the lights and extractor fan on together. Is it easy to install a seperate switch so the work independently?

I think that is how it should be. Seperating them may contravene some sort of electrical certifiction.
 

Firestorm

Pedant
Joined
Oct 25, 2003
Messages
15,238
Location
Immersed in the accounts
I think DWB is right, its how its meant to be, although I think its something to do with building regs regarding sanitation and ventilation,
The theory being that with no window there is no ventilation and all toilets have to be ventilated, and as there is no window there is no light so they will only be used when a light is switched on thus ventilation is provided at the same time (thats the way I have always seen it although I may be miles out ....)

Checked it out a bit

Building regs

I assume that to ensure compliance the vent has to come on every time the wc is used
 

A Century United

Firewalking for HD
Joined
Jan 26, 2007
Messages
10,004
I think DWB is right, its how its meant to be, although I think its something to do with building regs regarding sanitation and ventilation,
The theory being that with no window there is no ventilation and all toilets have to be ventilated, and as there is no window there is no light so they will only be used when a light is switched on thus ventilation is provided at the same time (thats the way I have always seen it although I may be miles out ....)

Checked it out a bit

Building regs

I assume that to ensure compliance the vent has to come on every time the wc is used

Correct, but as you point out it depends if there is an opening window in the ensuite.

The wiring for the fan is in two parts:

One directly and permanently connected to the mains (be careful, I once found a fan where the sparky had saved a couple of metres of wire by using the Earth section of the cable for the permanent feed), and:

One feed to the switch which then connects to a Triac(?) in the fan which switches the mains power and thus the fan. A Triac is used because once "switched" it is easy to latch it with a high voltage/low current circuit (capacitor, usually) thus letting the fan run on for a couple of minutes after the light switch is turned off.
 
Top