Metal or plastic screw connectors for electrical cables; fuse protection accessories namely reducing rings, insertable fitting sleeves for screws, insertable fitting sleeves for sockets, and insertable fitting sleeves for rings; electrical terminals of porcelain or of insulating material; electrical earthing apparatus namely earthing clamps, potential-equalising bars, earthing pipe clamps of galvanised malleable cast iron, cross-profile earthing devices, earth terminals, contact screws; electrical sockets; electrical terminal apparatus; cable conduits of metal or plastics; wiring conduits of plastics; electrical sockets; electrical branching boxes and adaptor boxes; voltage testers; electrical distribution boxes and electrical transition boxes with fastening bases; voltage testers; television couplings; television plugs; cable sleeves, aerials plugs, broadcasting plugs; coaxial plugs, plug adaptors, tapping clamps; banana pins; banana couplings; telephone jacks; indoor insulators; plug adaptors; surge diverters for the protection of electrical apparatus; over voltage filters for the protection of data processing installation