My daughter has had a single storey lean-to extension built.
The roof has 4" insulation above the insulated plasterboard ceiling as per current building regs. The ceiling has 9 downlights which are supposed to be led, but she is not sure if they have installed thge right type. the electrician...
How do I wire an outside PIR to a wall light inside the porch which is fed from a switched FCU the other side of the mounting wall. Does the pir wiring require an earth?