Flashcards in 4 Building Systems Deck (107)
High voltage electrical equipment is defined as operating at
600 volts or higher
Low voltage equipment operates at
Less than 600 volts
Used to convert high voltage service to manageable voltage for building use.
Transformers may be high or low voltage, their cooling method is one of two
Air or oil
Nonconductor of direct electrical current.
Older transformers carry what type of oil
High in PCBs, and must be labelled. Flammable.
Transformers located inside buildings must be enclosed in
3 hour rated transformer rooms if unsprinklered. Sprinklers present then 1 hr room
Diesel fuel power generator is most common type because
Gasoline is more hazardous and natural gas may be lost during power outages.
Generators may be located outside or on roofs for ventilation and cooling. If stored inside what is required.
Installed in fire rated room with fuel spill control
Day tanks are located in either the same room or on the generator and is typically limited in capacity by code to
60 gallons of diesel, usually kept full pumped by main tank
Lead acid batteries contain
Lead and sulfuric acid,
During charging, sulfuric acid releases
Lead acid batteries are also known as
Starved electrolyte cell
Maintenance free cell
Firefighting gear is not designed to be exposed to what concerning batteries
Small uninterruptible power supplies, UPS, containing lead acid batteries are found near
Fire a,arm control panels, under desks, next to computers.