BS 5685-1:1979

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Electricity meters. Specification for Class 0.5, 1 and 2 single-phase and polyphase, single rate and multi-rate watt-hour meters|Electricity supply meters, Meters, Wattmeters, Instrument scales, Power losses, Temperature-rise limit, Electrical testing, Impulse-voltage tests, Marking, Graphic symbols, Symbols, Errors, Dimensions, Electric terminals, Instrument cases, Fire tests, Circuits, Flammability

134 GBP