Mains electricity
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Mains electricity, utility power, grid power, domestic power, wall power, household current, or, in some parts of Canada, hydro, is a general-purpose alternating current electric power supply. It is t
A table lamp connected to a wall socket (the mains)
A 50 Hz ±5 Hz vibrating-reed mains frequency meter for 220 V
Electric power
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Electric power is the rate of transfer of electrical energy within a circuit. Its SI unit is the watt, the general unit of power, defined as one joule per second. Standard prefixes apply to watts as w
Mains electricity
…power, grid power, domestic power, wall power, household current, or, in some parts of Canada, hydro, is a general-purpose alternating current (AC) electric power supply. It is the form of electrical power that is delivered to homes and businesses through the electrical grid in many parts of the world. People use…
Electric power is transmitted by overhead lines like these, and also through underground high-voltage cables.
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