Lesson Glossary


Browse the glossary using this index

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E

Effeciency

The ratio of useful energy output to total energy input, expressed as a percentage. 


Electrical Energy

The energy that is used by an appliance at a given setting; determined by multiplying the power rating of an appliance by the length of time it is used. 


Electrical Power

The rate at which an appliance uses electrical energy. 


EnerGuide Label

A label that gives details about how much energy an appliance uses in one year of normal use. 


K

Kilowatt (kW)

A practical unit of electrical power; 1 kW = 1000 W 


Kilowatt-hour (kW-h)

The practical unit of electrical energy. 


P

Phantom Load

The electricity that is consumed by an appliance or device when it is turned off. 


S

Smart Meter

A meter that records the total electrical energy used hour by hour and sends this information to the utility company automatically. 


T

Time of Use Pricing

A system of pricing in which the cost of each kW-h of energy used is different at different times of the day. 


W

Watt (W)

A unit of electrical power.