A low power circuit for lighting, most commonly used for task
and table lamps and now largely discontinued.
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All metal pipes in buildings must be earthed electrically by
linking them all together with wires, which are then connected
to earth. This is done to prevent severe electrical shock to
persons should the pipes become live through a fault.
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A switch that replaces a fuse to protect from electrical overload.
If the circuit breaker is activated, pushing in the button can
reset it but the reason for activation should always be investigated,
especially if there is a repeat.
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The panel beside the meter on the consumer side of the meter,
which contains fuses or circuit breakers.
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This has the same function as RCD in cutting the power if minute
currents are detected.
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Cable where the electrical conductor core is made up of many
fine strands instead of the single wire as in twin and earth.
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The thin wire in a carrier which protects an electrical circuit.
Fuses occur as a cartridge or loose wire.
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A testing meter used to check the resistance of electrical circuits,
particularly earths, through a small power source which sends
several thousand volts at very low power through the circuit.
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Residual current device or breaker on the board beside the main
fuses or circuit breakers. This can also be a local device switch
as a socket or plug-in. The device monitors the earth and if
it finds any current which has crossed from the live side, it
switches off the power in a split second, thereby protecting
persons from electrical shock.
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The power circuit to sockets is found in the form of a wire
looped from socket to socket and back to the circuit breaker
to save on wire. This is known as a ring.
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Similar to a ring but fed from one end only.
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Standard power cable supplying sockets.
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The arrangement of two switches, which are linked so that either
can switch a light on or off.
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