glossary

Alternating Current (AC) - Electric current that reverses direction, usually many times per second. Most electrical generators produce alternating current.

Ampere (amp) - A measure of how much electricity is moving through a conductor.

Blackout - A total power failure over a large area; usually caused by the failure of major generating equipment or transmission facilities.

Bottom Ash - Slag or other residue remaining in the boiler after coal is burned.