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CAPACITY - The load for which a generating unit, generating station, or other

electrical

apparatus

is

rated

either

by

the

user

or

by

the

manufacturer.

See

also

NAMEPLATE

RATING.

Dependable - The load-carrying ability for the time interval and period specified when related to the characteristics of the load to be supplied. Dependable capacity of a station is determined by such factors as capability, operating power factor, and portion of the load which the station is to supply.

Hydraulic - The rating of a hydroelectric generating unit or the sum of such ratings for all units in a station or stations.

Installed Generating - See NAMEPLATE RATING.

Peaking - Generating units or stations which are available to assist in meeting that portion of peak load which is above base load.

Purchase - The amount of power available for purchase from a source outside the system to supply energy or capacity.

Reserve: Cold - Thermal generating units available for service but not maintained at operating temperature.

Hot - Thermal generating units available, up to temperature and ready for service, although not actually in operation.

Margin of - See CAPABILITY MARGIN.

Spinning - Generating units connected to the bus and ready to take load.

Thermal - The rating of a thermal electric generating unit or the sum of such ratings for all units in a station or stations.

Total Available - See CAPABILITY, GROSS SYSTEM.

CHARGE, ELECTRIC ENERGY - See ENERGY, ELECTRIC.

CLASSES OF ELECTRIC SERVICE - See class name for definition of each.

Sales to Ultimate Customers:* Residential Commercial and Industrial Commercial Industrial Small Light and Power Large Light and Power

Public Street and Highway Lighting Other Public Authorities Railroads and Railways Interdepartmental

Sales for Resale (Other Electric Utilities): Investor-Owned Companies Cooperatively Owned Electric Systems

Municipally Owned Electric Systems Federal and State Electric Agencies

*Companies customers in

service rural customers under distinct rural rates and classify these sales as "Rural." rural areas under standard Residential, Commercial and Industrial rates and so classify

However, many companies service such sales. Consequently, "Rural"

is a rate classification rather and/or Commercial service),

than a customer classification and since it is frequently confused with "Farm Service" (a the "Rural" classification has been generally discontinued as a customer classification.

type

of

Residential

58

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