2.1 High voltage power system is a voltage exceeding 1,000 volts
2.2 systems, low voltage power system is a voltage not exceeding 1,000 volts, 2.3 volts
(volt.)
2.4 voltage is measured in amperes. (amp.) is a unit of electric current
2.5 watts (watt.) is a unit of power used to actually
2.6 units (unit) is a unit of power used per hour, there is a device used to measure the kilowatt meter horn (kwh.)
.
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