An electric system's ability (maintenance, load following, planning for future needs, etc.) to supply the aggregate electrical demand and energy requirements of its customers at all times

A rural electric cooperative that generates or buys wholesale electricity to distribute to its customers in a service territory that may cover a wide geographical area; a cooperative is owned and operated by its members and may offer additional services

the independent agency within the United States Department of Energy that regulates the transmission and wholesale sales of electricity in interstate commerce

Any consumer of electrical energy; also, the amount of power (demand) used by a utility system, electrical device or consumer. Load can be manually or automatically curtailed or shed temporarily during times of high usage (customers have agreed beforehand to such actions) or managed to ensure a reliable electricity supply