fire hydrant means a fire plug or fixed pillar fire hydrant;
Plasma arc incinerator means any enclosed device using a high intensity electrical discharge or arc as a source of heat followed by an afterburner using controlled flame combustion and which is not listed as an industrial furnace.
Fire alarm system means a system designed to detect and annunciate the presence of fire, or by-products of fire. Fire alarm system includes smoke detectors.
Basement means any area of the building having its floor subgrade (below ground level) on all sides.
X-ray high-voltage generator means a device which transforms electrical energy from the potential supplied by the x-ray control to the tube operating potential. The device may also include means for transforming alternating current to direct current, filament transformers for the x-ray tube(s), high-voltage switches, electrical protective devices, and other appropriate elements.