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  2. Knob-and-tube wiring - Wikipedia

    en.wikipedia.org/wiki/Knob-and-tube_wiring

    Other ceramic pieces would typically be used as a junction point between the wiring system proper, and the more flexible cloth-clad wiring found in light fixtures or other permanent, hard-wired devices. When a generic power outlet was desired, the wiring could run directly into the junction box through a tube of protective loom and a ceramic ...

  3. Electrical conduit - Wikipedia

    en.wikipedia.org/wiki/Electrical_conduit

    This type of "decorative" conduit is designed to provide an aesthetically acceptable passageway for wiring without hiding it inside or behind a wall. This is used where additional wiring is required, but where going through a wall would be difficult or require remodeling. The conduit has an open face with removable cover, secured to the surface ...

  4. Electrical wiring - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring

    The first rubber-insulated cables for US building wiring were introduced in 1922 with US patent 1458803, Burley, Harry & Rooney, Henry, "Insulated electric wire", issued 1923-06-12, assigned to Boston Insulated Wire and Cable . These were two or more solid copper electrical wires with rubber insulation, plus woven cotton cloth over each ...

  5. Light curtain - Wikipedia

    en.wikipedia.org/wiki/Light_curtain

    A light curtain. When a beam of infrared light is broken, a safety function is activated. A light curtain is a safety device that detects when a beam of infrared light has been broken by a person passing through an area.

  6. Light fixture - Wikipedia

    en.wikipedia.org/wiki/Light_fixture

    A light fixture (US English), light fitting (UK English), or luminaire is an electrical lighting device containing one or more light sources, such as lamps, and all the accessory components required for its operation to provide illumination to the environment. [1] All light fixtures have a fixture body and one or more lamps.

  7. Wireless light switch - Wikipedia

    en.wikipedia.org/wiki/Wireless_light_switch

    Wireless light switches eliminate the wire from the light to the switch location. This is useful in remodelling situations where new wiring can be a hassle. Rather than tearing down a wall to gain access to the wires, a wireless switch can be used. This avoids any need to access wires and makes remodelling fast and simple.

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  9. Gooseneck (fixture) - Wikipedia

    en.wikipedia.org/wiki/Gooseneck_(fixture)

    A wire with a triangular cross-section is wound around this, so that the tips of the triangle protrude between the round wires into the inner spiral. [1] If the gooseneck is bent in one direction, the distance between the round wires is slightly larger on the outside and slightly smaller on the inside.

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