Wrong Switch?

[wadia860]

Hi,

I've just been given an electronic timer switch for my security light in my back garden. Could someone please look at the diagram and tell me if it's the correct type of switch?

TIA

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[Spark123]

Is the old one fed from a lighting ciruit? I'm wondering why it is fused - could be as it is from a socket circuit.
If it is from the lighting circuit then you need to join the 2 neutrals together in a piece of terminal block and just connect live and switch live to the switch. Ignore the 2 way.
The earths connect together and to the earth terminal if provided.

If it is from the socket circuit then you may be better leaving the FCU where it is and adding the new switch next to it.

 

[bernardgreen]

The present switch also has a fuse in it. That might be an essential part of the safety of the installation.

Where does the power come from ? Does it come from a lighting circuit ( 6 amp or less fuse/MCB in CU or from a supply to sockets ( 20 amp or more fuse / MCB ) in the CU

If from sockets then you MUST have that fuse in the circuit.

Live feed to Live on switch. Lamp connects to Load on the switch.

Neutrals in a terminal block. Earths in a terminal block


http://www.greenbrook.co.uk/pdf/T40SWiringDiags.pdf

edit ( delayed by long phone call while writting this )

 

[wadia860]

Thanks so much fellas.
The power appears to come from sockets and not from the lighting ring. Also, there is a fuse on the front of the new switch (20mm x 5mm).

 

[Taylortwocities]

Make sure the fuse on the new switch is 3amp.