Electric and electronic apparatus, namely, electrical connectors, electric contacts, terminal clamps in the nature of electrical connectors, electrical terminal blocks, plug-in connectors, electric plugs, electric sockets [ and magnetic contacts, fuses, electrical relays, commutators, ] protective caps in the nature of component parts of electrical connectors, mains lead cleats, namely, strain reliefs to be used with electrical connectors to retain cables and conductors in the connectors [ ; mounting rails, namely, rails to be fixed on transformers, switch and control cabinets and other electrical equipment to hold terminal blocks and connectors; electric installation material, namely, plastic conduit for use in electrical installations, electric switches, circuit breakers ]