Hierarchy classification:

1. top of the aat hierarchies
2. Objects Facet
3. Components (hierarchy name)
4. components (objects parts)
5. [components by specific context]

Additional parents:

1. top of the aat hierarchies
2. Objects Facet
3. Object Groupings and Systems
4. systems

Narrower term/s

• electrical system components[+]
  • actuators
  • oscillators
  • transistors
  • electron tubes [+]
    • diodes [+]
      • LEDs (electron tubes)
    • vacuum tubes [+]
      • cathode ray tubes [+]
  • capacitors
  • electrodes [+]
    • ion-selective electrodes
  • insulators
  • resistors
  • rheostats [+]
    • potentiometers [NP]
  • rheotomes
  • raceways [+]
    • busways
  • electric cables [+]
    • armored cables
  • circuit breakers
  • circuits
  • electric conduits
  • switchboards
  • electric switches
  • electric wiring
  • ground-fault circuit interruptors
  • power outlets
  • panelboards
  • receptacles
  • transformers [+]
    • step-down transformers
    • step-up transformers
  • circuit boards
  • occupancy sensors
  • photovoltaic cells [+]
    • solar cells
  • punch blocks (electrical connections)
  • magnetrons
  • [temporary alphabetical list: electrical system components] [+]
    • alligator clips
    • anodes
    • ballast tubes
    • battery adapters
    • battery charger adapters
    • battery jars
    • battery testers
    • cable fault locators
    • AC-DC converters
    • binding posts
    • cathodes
    • decade boxes
    • dimmer switches
    • electric wires
    • electrical adapters
    • electrical boxes
    • electrical chokes
    • electrical maintenance & repair equipment
    • electrical modulators
    • electrical outlets
    • electrical plugs
    • electrical shunts
    • electrical switches
    • electrical terminals
    • electrical testers
    • electrical tubes
    • electrician's pliers
    • electrolytic capacitors
    • extension cords
    • fuse blocks
    • fuse boxes
    • fuse pullers
    • impedance transformers
    • induction coils
    • growlers
    • junction boxes
    • knife switches
    • magneto and coil testers
    • outlet boxes
    • relays
    • resistance boxes
    • resonant transformers
    • plug adapters
    • power cords
    • receptacle plugs
    • transfer switches
    • tube sockets
    • utility boxes
    • variable capacitors
    • voltage multipliers
    • single side band modulators
    • socket covers
    • socket plugs
    • wire nuts
    • wire sorters
    • solenoids
    • solenoid switches
    • spark arresters
    • tesla coils
    • time switches
• [plumbing and stormwater system components][+]
  • leader heads
  • catch basins
  • cesspools
  • cisterns (plumbing components)
  • drains [+]
    • area drains
    • fixture drains
    • storm drains
    • French drains
  • gutters (building drainage components) [+]
    • arris gutters
    • valley gutters
    • back gutters
    • eaves gutters
  • piping (plumbing system components) [+]
    • downspouts
    • drainage piping
    • DWV piping
    • mains (plumbing)
    • stacks (piping) [+]
      • soil stacks
      • vent stacks
      • waste stacks
    • risers (piping)
    • service pipes
    • pipe fittings (components)
  • plumbing fixtures [+]
    • drinking fountains
    • washfountains
    • bathtubs [+]
      • sitz baths
      • shower baths
      • hideaway bathtubs
    • bidets (plumbing fixtures)
    • sinks (fixtures) [+]
      • lavatories (sinks)
      • wash sinks
      • slop sinks
      • dry sinks [NP] [+]
      • lavaboes (sinks)
    • toilets (fixtures) [+]
      • chemical toilets
    • urinals (plumbing fixtures)
    • laundry trays
    • water conditioners
    • shower heads
    • bath basins
  • seepage pits
  • septic tanks
  • sumps
  • traps (plumbing system components) [+]
    • fixture traps
    • house traps
  • water heaters [+]
    • solar water heaters
  • water storage tanks
  • leaching fields
  • impluvia
  • waterspouts [+]
    • gargoyles
    • lion-head spouts
    • śuṇḍu
  • safes (plumbing components)
  • rain barrels
  • [temporary alphabetical list: plumbing and stormwater system components] [+]
    • bathroom sinks
    • drain covers
    • indoor fountains
    • kitchen sinks
    • pedestal sinks
    • plumbing & drainage elements
    • plumbing pipes
    • plumbing pumps
    • sink sprayers
    • sink stoppers
    • water heater stands
    • water supply pipes
  • nāla
• HVAC components[+]
  • ventilation system components [+]
    • ventilators (ventilation components)
    • air filters [+]
      • dry filters
      • viscous impingement filters
    • air-handling units
    • blowers
    • dampers (HVAC components)
    • air distribution systems
    • air diffusers
    • air ducts
    • registers (HVAC components)
    • cowls (ventilation system components)
    • plenum chambers
    • fume hoods
  • [cooling, heating and humidifying components] [+]
    • furnaces (heating components) [+]
      • warm air furnaces [+]
    • air washers
    • boilers (HVAC components) [+]
      • hot water boilers
      • steam boilers
    • cooling towers
    • heat pumps [+]
      • solar-assisted heat pumps
      • geothermal heat pumps
    • heat exchangers [+]
      • coils (heat exchangers) [+]
      • condensers (heat exchangers)
      • borehole heat exchangers
    • thermostats
    • radiator enclosures
    • breechings
    • trompes (cooling components)
    • solar thermal panels
    • stovepipes (pipes)
  • heat-distributing units [+]
    • baseboard units
    • convectors
    • radiators
    • thermal masses
• telecommunication systems components[+]
  • television receivers
  • radio receivers
  • telephones [+]
    • cellular telephones
    • smartphones
  • transceivers [+]
    • walkie-talkies
  • antennas [+]
    • [antennas by form] [+]
      • horn antennas
      • parabolic antennas [+]
    • [antennas by function] [+]
      • satellite home antennas
  • field telephones
  • telephone wires
  • microphones [NP] [+]
    • dynamic microphones
    • ribbon microphones
    • condenser microphones
    • lavaliers
  • telegraphs [+]
    • engine-room telegraphs
  • liquid crystal displays
  • remote controls
  • [temporary alphabetical list: telecommunication systems components] [+]
    • answering machines
    • antenna insulators
    • antenna lead cables
    • antenna rotors
    • antenna wires
    • cable connectors
    • cable converters
    • communication insulators
    • console radios
    • console televisions
    • cordless telephones
    • car radios
    • cb radios
    • coaxial cables
    • coherers
    • coin-operated telephones
    • color converters
    • crystal radios
    • descramblers
    • desk telephones
    • instructographs
    • grounding rods
    • headsets
    • magneto telephones
    • pagers
    • morse code instruction devices
    • natrometers
    • omnigraphs
    • remote servos
    • rooftop antennas
    • portable radios
    • portable televisions
    • radio antennas
    • radio frequency amplifiers
    • radio headsets
    • radio scanners
    • radio transmitters
    • radio tuners
    • radiophones
    • transistor radios
    • transmitters (telecommunication )
    • transponders
    • satellite dishes
    • satellite telephones
    • scramblers
    • set-top antennas
    • uhf converters
    • varioplexes
    • signal splitters
    • wall telephones
    • stock tickers
    • submarine cables
    • table radios
    • tdds
    • telecommunication accessories
    • telecommunication cables
    • telecommunication devices
    • telecommunication equipment cases
    • telecommunication media
    • telecommunication wire
    • telegraph keys
    • telegraph printers
    • telegraph sounders
    • telegraph wires
    • telegraph wire insulators
    • telemeters
    • telephone cables
    • telephone cases
    • telephone jacks
    • telephone line doublers
    • telephone switchboards
    • telephone wire insulators
    • teleprinters
    • teletypes
    • teletypewriters
    • television antennas
    • television converters
    • television transmitters
    • television tuners
    • ticker tape
    • ticker tape machines
  • fax machines
  • televisions (viewing devices)
• infrastructural elements[+]
  • dam elements [+]
    • fishways
    • spillways
    • stilling basins
    • penstocks
  • transportation elements [+]
    • bridge elements [+]
      • bridge approaches
      • cutwaters
      • lift bridge towers
    • [road and roadside elements] [+]
      • curbs
      • gutters (roadside elements)
      • median strips
      • intersections [+]
      • roadside rest areas
      • roadsides
      • roadways
      • speed bumps
      • street furniture [+]
      • traffic islands
      • lanes (road elements) [+]
      • [manholes and manhole components] [+]
      • shoulders (roadside elements)
      • grade separations [+]
      • pedestrian facilities [+]
      • road bends
      • access ramps
    • grade crossings
    • transit system elements [+]
      • signal gantries
      • [tracks and track components] [+]
      • railroad junctions
    • roadbeds
  • utilities components [+]
    • water mains
    • utility poles [+]
      • telephone poles
    • power lines
    • gas pipelines
    • oil pipelines [+]
      • oil pipeline junctions
    • oil pumping stations
• protection system components[+]
  • fire alarm system components [+]
    • fire detectors [+]
      • flame detectors
      • temperature detectors
    • smoke detectors [+]
      • ionization detectors
      • photoelectric smoke detectors
    • manual stations
  • fire extinguishing system components [+]
    • fire sprinklers
  • security system components [+]
    • burglar alarms
  • [temporary alphabetical list: protection system components] [+]
    • alarms
    • gas alarms
    • gas detectors
    • gas mask carriers
    • fire alarm boxes
    • fire protection devices [+]
      • backpack pumps
      • fire blankets
      • fire buckets
      • fire bucket racks
      • fire extinguisher holders
      • fire hooks
      • fire hose adapters
      • fire hose jackets
      • fire hose nozzles
      • fire hose racks
      • fire hose reels
      • fire ladders
      • fire plug wrenches
    • protective devices
    • security card readers
    • security devices
    • security keypads
    • security locks
    • security scanners
    • smoke alarms
    • x-ray security scanners
    • sandbags

Anotations

Scope note:

Parts or components of systems.