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  2. Underwriter's knot - Wikipedia

    en.wikipedia.org/wiki/Underwriter's_knot

    The knot is typically used as a stopper knot where a lamp or appliance cord passes through a hole or slot of a plug or socket. Its purpose is to "reduce strain on the screw terminal connections—where the metal parts of the wires connect to the socket or plug—and prevent the wires from pulling free."

  3. Pull switch - Wikipedia

    en.wikipedia.org/wiki/Pull_switch

    The most common use of a pull switch is to operate a ceiling electric light.The ceiling fan and mechanical wall fans are also appliances often operated by pull switches. . Pull switches may be either two-position (open or closed) or multi-position (allowing for different fan speeds or levels of illuminati

  4. Light switch - Wikipedia

    en.wikipedia.org/wiki/Light_switch

    Another style of mercury light switch uses a metal wheel with an insulator separating the two halves that has a hole which allows the mercury to connect either side of the wheel in only one position. [12] Some of these switches were also equipped with a neon lamp connected across the contacts, and thus in series with the electrical load. This ...

  5. Electrical wiring in North America - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring_in_North...

    With lamp cord wire the ribbed wire is the neutral, and the smooth wire is the hot. NEC 2008 400.22(f) allows surface marking with ridged, grooves or white stripes on the surface of lamp cord. With transparent cord the hot wire is copper colored, and the neutral is silver colored.

  6. Bootleg ground - Wikipedia

    en.wikipedia.org/wiki/Bootleg_ground

    A receptacle with a bootleg ground. In building wiring installed with separate neutral and protective ground bonding conductors (a TN-S network), a bootleg ground (or a false ground) is a connection between the neutral side of a receptacle or light fixture and the ground lug or enclosure of the wiring device.

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  8. AC power plugs and sockets: British and related types

    en.wikipedia.org/wiki/AC_power_plugs_and_sockets:...

    The important socket dimensions which the standard does specify are: A minimum insertion of 9.6 mm from the face of the socket-outlet to the first point of contact with a live part, [67] a minimum distance of 9.5 mm from the line and neutral apertures to the periphery of the socket face, [68] and not to exceed dimensions for the apertures of 7. ...

  9. Power cord - Wikipedia

    en.wikipedia.org/wiki/Power_cord

    A lamp cord (also known as a zip cord) is a light-weight, ungrounded, single-insulated two-wire cord used for small loads such as a table or floor lamp. A cord set includes connectors molded to the cord at each end (see Appliance coupler). Cord sets are detachable from both the power supply and the electrical equipment, and consist of a ...