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  2. Three-prong adaptor - Wikipedia

    en.wikipedia.org/wiki/Three-prong_adaptor

    The grounding wire would be diverted around the adapter to reach the faceplate screw above it. However, this ground-wire style of cheater plug was discontinued when it was noted that a loose unattached grounding wire could accidentally become connected to the "hot" blade of a nearby outlet, potentially leading to electric shock. As an ...

  3. NEMA connector - Wikipedia

    en.wikipedia.org/wiki/NEMA_connector

    Cheater plug adapters allow a "3-prong" grounded 5-15P plug to be mated to a non-grounded 1-15R receptacle. The adapters include a spade lug to allow connecting to ground, often via the cover screw used to attach the outlet faceplate. These adapters are illegal in some jurisdictions, in particular throughout Canada. [14]

  4. Aluminum building wiring - Wikipedia

    en.wikipedia.org/wiki/Aluminum_building_wiring

    Depending on the annealing grade, AA-8176 may elongate up to 30% with less springback effect and possesses a higher yield strength (19.8 ksi or 137 MPa, for a cold-worked AA-8076 wire). [citation needed] A home with aluminum wiring installed prior to the mid-1970s (as the stock of pre-1972 aluminum wire was permitted to be used up) likely has ...

  5. Telephone jack and plug - Wikipedia

    en.wikipedia.org/wiki/Telephone_jack_and_plug

    The installation of a conventional wired telephone set has four connection points, each of which may be hardwired, but more often use a plug and socket: telephone line to phone cord: The wall jack. This connection is the most standardized, and often regulated as the boundary between an individual's telephone and the telephone network.

  6. Punch-down block - Wikipedia

    en.wikipedia.org/wiki/Punch-down_block

    A tool called a punch down tool is used to push the wire down firmly and properly into the slot. Some will automatically cut any excess wire off. [ 1 ] The exact size and shape of the tool blade varies by manufacturer, which can cause problems for those working on existing installations, especially when there is a poorly documented mix of ...

  7. Knob-and-tube wiring - Wikipedia

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

    Knob-and-tube wiring (sometimes abbreviated K&T) is an early standardized method of electrical wiring in buildings, in common use in North America from about 1880 to the 1930s.

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

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

    BS 1363 was introduced in 1947 as one of the new standards for electrical wiring in the United Kingdom used for post-war reconstruction. This plug corresponds to Type G in the IEC table. [38] BS 1363 replaced the BS 546 plug and socket (which are still found in old installations or in special applications such as remotely switched lighting ...

  9. CEE 7 standard AC plugs and sockets - Wikipedia

    en.wikipedia.org/wiki/CEE_7_standard_AC_plugs...

    CEE 7/1 and CEE 7/4 are still occasionally found in less used areas of some older homes, particularly in outbuildings or hot presses. Schuko is an abbreviation for the German word Schutzkontakt, which means "Protective contact" - in this case "protective" refers to the earth.