When choosing cable, the main thing is the cross-section (mm²), which must withstand the line current. A small cross-section overheats and is dangerous, so skimping here is a bad idea. As a guide: lighting usually takes 1.5 mm², sockets 2.5 mm², and heavy appliances (electric stove, water heater) 4–6 mm².
Copper beats aluminium: it is more conductive, more flexible and longer-lived, especially for indoor wiring. Mind the insulation and the intended use — indoor, outdoor or underground installation.
Do not forget to match the cable cross-section to the line's breaker rating. The Electrica Group catalogue carries cable and wire, cable ducts, trays and installation accessories for the whole line, and our specialists will help choose the right cross-section — the "For Long Life" way.
