Which type of cable is typically used for fixed lighting and power circuits in UK domestic installations?

• A. Twin-and-earth (T&E) copper conductor
• B. Armoured cable (SWA)
• C. Flat ribbon cable
• D. Coaxial cable

Answer: (A)

In UK domestic fixed wiring, the standard choice for lighting and power circuits is a twin-and-earth cable. This type contains two insulated conductors (live and neutral) plus an earth conductor all inside a single protective sheath, making it practical to run inside walls, floors, and other fixed structures. Its design is specifically suited for the continuous, permanent wiring that feeds lighting and outlets, and it works with the usual fuse and protective device arrangements used in homes.

The other cables have different typical uses. Armoured cable is chosen when extra mechanical protection is needed, such as for outdoor or buried runs. Flat ribbon cable is not used for standard fixed home circuits; it’s more common in older appliances or specific internal wiring within equipment. Coaxial cable carries signals rather than power, so it’s not used for lighting or general power circuits.