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Electricity meter, c 1930.

Electricity meter, c 1930.
4 0 c m
actual image size: 30cm x 32cm


A 'Type H' single phase service meter based on the electromagnetic induction principle. Inside this meter is a spinning plate moved by electromagnetic induction, which is geared to a series of dials that register the amount of electricity used, based on how much the plate rotates. It shows the amount of electricity used in kilowatt-hours (1000 watts of power for one hour of time).

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© Science Museum / Science & Society Picture Library

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