Adding a security light to existing wiring

[jmc2000]

I want to add a security light to the back of my house, by replacing an existing 1-gang light switch with a 2-gang, routing the new wiring as required, which looks very straight forward. However, there are a number of issues I'm concerned about:

1. Will I need to get it checked by law?

2. The instructions for the security light suggest *only* using HO5RN,3G,1.00mm^2 cable or "better". But the electrician used standard cable to wire the security light at the front of the house:

http://www.screwfix.com/p/prysmian-6242yh-twin-earth-cable-2-5mm-x-10m-grey/82572

Is this stuff OK for an outside north facing wall?

Cheers in advance,

Jmc

 

[PrenticeBoyofDerry]

1. Will I need to get it checked by law?

I doubt the Chinese police will care!

2. The instructions for the security light suggest *only* using HO5RN,3G,1.00mm^2 cable or "better". But the electrician used standard cable to wire the security light at the front of the house:

Twin and earth is not suitable for the external environment, unless contained within conduit

http://www.screwfix.com/p/prysmian-6242yh-twin-earth-cable-2-5mm-x-10m-grey/82572

Is this stuff OK for an outside north facing wall?

No! per as above!

The light will not work without a neutral conductor, so if that is not available at the switch you will need to route one from a fitting. Do not automatically think you have a neutral at the switch, it is very likely you have not!