Kilovolt-ampere: the quantity of total power, the vector sum of kilowatt (productive or useful power) and reactive kilovolt-ampere (nonproductive power).

Reactive kilovolt-ampere: the quantity of electric power which can not be used to do productive work.

Power factor: the ratio of kilowatt to kilovolt-ampere, often expressed as a percentage, used to describe the ratio of the working or useful power to the total power consumed.

Kilowatt-hour: the quantity of kilowatt consumed multiplied by the actual number of hours of use.  One kilowatt used for one hour equals one kilowatt-hour.

Monthly maximum demand: the highest demand registered during the billing period.

Billing demand: the demand used in the calculation of the bill, derived according to the applicable rate schedule.

Average demand: kilowatt-hours divided by the number of hours in the billing period.

Hours-use: the ratio of kilowatt-hour to maximum demand.

Load factor: the ratio of average demand to the monthly maximum demand.