keenbutconfused wrote:

Electrics in bathroom are as follows. One pull switch which turns the
one light fitting on and off. When I turn on the light the fan also
comes on. There is an isolator switch whcih can be used to turn off the
fan whilst the light is still on. When the light is turned off the fan
stays on and then turns itself off after about 5 minutes. There is also
a shaver socket.

The fan will expect a neutral plus a permanent live and a switched live.
It looks like the power feed to the light has been taken to the switch
position rather than the (now) more common "loop in" wiring where power
it taken to the fitting first and a separate drop wire is run back to
the switch.

Hence the setup you currently have is with the earth being used as a
switched live...

I have been given two suggestions as to how to fix this. Either put in
tc&e cable between pullcord and light. However I do not have access to
the void where the cable runs.

The other option would be if you could get power to the light position
from elsewhere - then you could demote the cable drop to the switch to
the task of supplying only the switching function rather than also
having to provide a full feed with neutral.

Can you get the the light position from the loft/room above the bathroom?

The second suggestion is to wire up as per this diagram.

http://putfile.com/pic.php?pic=6/17015330484.jpg&s=x2

This would lose me the use of the timer in the fan but would give me
back an effective earth hence making it safe.

Yup that ought to work OK at the expense of loss of the "run on" timer.

Without more cores to your cable (or providing power to the fitting
itself rather than the switch) that is as good as you are going to get it.


--
Cheers,

John.

/================================================== ===============\
| Internode Ltd - http://www.internode.co.uk |
|-----------------------------------------------------------------|
| John Rumm - john(at)internode(dot)co(dot)uk |
\================================================= ================/