Rcd fused spur bathroom Fan

[nrg]

Hi All

I have a customer with a single rcd board, protecting the sockets and the garage only. They wanted a fan installing in the bathroom which needs to be rcd protected. I was going to pit and RCBO on the board for the upstairs light but crabtree have discontinued them. So I though I would install a RCD Fused spur.

I split the bathroom lighting circuit in the rose and did the following.

Ran a L N SL from the rose to the rcd using 3 core
Connected L N to rcd and SL to fan isolator switch
Connected L N from RCD to fan isolator
Connected bathroom light switch to L SL of isolator
Connected L N SL to fan

Basically what happens is the rcd unit trips out as soon as I turn the bathroom light switch on. If I remove the neutral from the rcd direct to the fan isolator everything works fine, but obviously the rcd is then useless.

I suspect a neutral issue but all lights have the same neutral. Any ideas?

Thanks In advance

 

[SimpleSimon]

Yes my own fault! So basically run my incoming live and neutral to the rcd unit and then back to the ceiling rose and connect as you would normally to Fan Isolator and onto fan.

That's it. And than that protects the light and fan

 

[ezzzekiel]

yep that is the only sensible way if providing it can not be achieved at origin, you are only working on the lighting circuit and so that is all you are responsible for, ensure the work you carry out is covered and you have done all you can.

 

[RogertheBodger]

Don't forget to take a neutral from the RCD to the ceiling rose.

 

[nrg]

Thanks for everyones help and input