Mains electricity



Before watching this video, please ensure that you have understood the following Electricity topics: Electric charge and current; Potential difference, current and resistance; Series and parallel circuits; and finally, Power and energy transfers.

We are all reliant on the convenience of the on-tap energy which we obtain via the electrical sockets in our homes, schools and places of work.  In this video, we’ll talk briefly about the mains electricity supply, before going on to look at the three-core cable, the wiring of a plug, and the various ways in which the users of electricity are protected from its significant hazards.

Key Words

frequency, three-core cable, neutral, socket, insulation, plug, fuse, wiring, potential difference, earth, mains electricity, live, alternating, double insulation, direct, circuit breaker, ac, electrocution, dc