Installation of Outdoor Light

Thesis · Feb 7, 2023

Hey guys,

looking for a bit of advise on the installation of an outside light.

I plan on chasing out the plasterboard and running a cable from a spare light switch in the kitchen through to the exterior (approx. 4.5m away).

The light I have seen is: LAP Weyburn Outdoor LED Floodlight Black 50W 5000lm - Screwfix - https://www.screwfix.com/p/lap-weyburn-outdoor-led-floodlight-black-50w-5000lm/671pg

I currently have some 2.5mm grey twin and earth. The light itself is .75mm cable. Do I need to get some 1.5mm or .75 cable instead? It looks like all the existing circuits are 1.5mm. The circut is protected on a 6a mcb.

Secondly, what is the best way to connect, can i use Wago connectors / terminal block and push in to the cavity, or is it best to use an interior junction box in the wall and connect the flex from the light internally?

thanks,

davesparks · Jun 7, 2023

PeakSteve said:
0.75mm (flex) isn't recognised by BS7671

Yes it is.

PeakSteve said:
(and flex wire is frowned upon for fixed installation),

No it isn't.

PeakSteve · Jun 8, 2023

BS7671 2022
Table 52.3: Lighting and Power circuits: min 1.0mm

521.9.1: A flexible cable shall be used for wiring only when the relevent provisions of BS7671 are met (i.e. see above).
Flexible cables used for fixed wiring shall be of the heavy duty type unless .....

So minimum 1.0mm heavy duty, or protected against mechanical damage.
(Perhaps not "frowned upon" but used conditionally! Easier to advise a non-electrician that it isn't the perfect choice)