The Electric Meter Box on a home often resembles a large glass jar with a bunch of wheels and dials inside.Inside the electric meter, four or five dials measure kilowatt hours- the units of electricity you're billed for kilowatt hour is equal to 1000 watt hours, the amount of energy it would take to light ten 100-watt light bulbs for one hour. Each month a utility company representative records the dial readings. The previous month's reading is subtracted from the current month's to come up with the usage that appears on your bill.
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