Is it ok to run an extractor fan in a bathroom in Twin & Earth if client wants it Independant from the bathroom lighting?

[jamest4541]

Basically, the room in which i am talking about has a twin and earth feed from a switch downstairs which was originally for an outside light. The client would like to take that feed and use it for an extractor fan in the new converted bathroom. The cable used is twin and earth. If i were to make the downstairs switch (which was for the outside light) the isolator switch for the fan (as its not a good idea to have it inside the bathroom) could i use the twin and earth for the fan directly, as he wants it independent from the lights in the bathroom therefore not requiring the need of a switch line?

Also, there is no access above the ceiling, only under floor boards, and the cable to run up to the extractor fan has to be run in surface PVC trunking.

Any help would be much appreciated!

 

[Markyd]

Any new construction or extension of a building counts as ‘notifiable’ work. This means you must let the local council building-control department or a privately run building control service know about it, so it can inspect and certify the work on completion.

You also need building-regulations approval for some home alterations, including:

Electrics:

• replacing fuse boxes and connected electrics
• changing electrics near a bath or shower
• adding new circuits

Glazing / ventilation:

 

[Des 56]

You seem set on using this spare supply so best bet is do exactly as suggested in post 16