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# How many KilowattHours will cause a standard electrical meters disk to revolve 138.88 times?

Updated: 10/23/2022

Wiki User

17y ago

The following quote from "Wikipedia, the free encyclopedia" should help you better understand the way in which an electromechanical meter works. Wikipedia says, "The amount of energy represented by one revolution of the disc is denoted by the symbol KWh which is given in units of watt-hours per revolution. The value 7.2 is commonly seen. Using the value of KWh, one can determine their power consumption at any given time by timing the disc with a stopwatch. If the time in seconds taken by the disc to complete one revolution is t, then the power in watts is P = 3600×KWh/t. For example, if KWh = 7.2, as above, and one revolution took place in 14.4 seconds, the power is 1800 watts. This method can be used to determine the power consumption of household devices by switching them on one by one."
Source: http://en.wikipedia.org/wiki/Electricity_meter

Wiki User

17y ago