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  2. Magic smoke - Wikipedia

    en.wikipedia.org/wiki/Magic_smoke

    "Magic" smoke being released from an electronic component for demonstration purposes. Magic smoke (also factory smoke, blue smoke, or the genie) is a humorous name for the caustic smoke produced by severe electrical over-stress of electronic circuits or components, causing overheating and an accompanying release of smoke.

  3. Trailer connectors in North America - Wikipedia

    en.wikipedia.org/wiki/Trailer_connectors_in...

    Reversing lamps, control current to block surge brakes when reversing. Red or Purple: 6: 10: 3 L54: Left Turn Signal, Stop lamps: Yellow: 4: 12: 4 15 +12 V via ignition lock: Black: 10: 8: 5 R54: Right Turn Signal, Stop lamps: Green: 4: 12: 6 58: Tail lamps, clearance lamps/outline marker lamps and registration plate lamp: Brown: 4: 12: 7 ...

  4. Gaseous fire suppression - Wikipedia

    en.wikipedia.org/wiki/Gaseous_fire_suppression

    Canisters containing argon gas for use in extinguishing fire in a server room without damaging equipment. Gaseous fire suppression, also called clean agent fire suppression, is the use of inert gases and chemical agents to extinguish a fire.

  5. Junction box - Wikipedia

    en.wikipedia.org/wiki/Junction_box

    A small metal, plastic or fiberglass junction box may form part of an electrical conduit or thermoplastic-sheathed cable (TPS) wiring system in a building. If designed for surface mounting, it is used mostly in ceilings, concrete or concealed behind an access panel—particularly in domestic or commercial buildings [2].

  6. Smudge pot - Wikipedia

    en.wikipedia.org/wiki/Smudge_pot

    A smudge pot (also known as a choofa or orchard heater) is an oil-burning device used to prevent frost on fruit trees. Usually a smudge pot has a large round base with a chimney coming out of the middle of the base. The smudge pot is placed between trees in an orchard. The burning oil creates heat, smoke, carbon dioxide, and water vapor.

  7. Ventilation (architecture) - Wikipedia

    en.wikipedia.org/wiki/Ventilation_(architecture)

    Ventilation is mainly used to control indoor air quality by diluting and displacing indoor pollutants; it can also be used to control indoor temperature, humidity, and air motion to benefit thermal comfort, satisfaction with other aspects of the indoor environment, or other objectives.

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  9. Circuit breaker - Wikipedia

    en.wikipedia.org/wiki/Circuit_breaker

    Large low-voltage molded-case and power circuit breakers may have electric motor operators so they can open and close under remote control. These may form part of an automatic transfer switch system for standby power. Low-voltage circuit breakers are also made for direct-current (DC) applications, such as for subway lines.