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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

    NEMA wiring devices are made in current ratings from 15 to 60 amperes (A), with voltage ratings from 125 to 600 volts (V). Different combinations of contact blade widths, shapes, orientations, and dimensions create non-interchangeable connectors that are unique for each combination of voltage, electric current carrying capacity, and grounding ...

  4. 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 ...

  5. Knob-and-tube wiring - Wikipedia

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

    Historically, wiring installation requirements were less demanding in the age of knob-and-tube wiring than today. Compared to modern electrical wiring standards, these are the main technical shortcomings of knob-and-tube wiring methods: never included a safety grounding conductor

  6. 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.

  7. HomePNA - Wikipedia

    en.wikipedia.org/wiki/HomePNA

    The HomePNA Alliance (formerly the Home Phoneline Networking Alliance, also known as HPNA) is an incorporated non-profit industry association of companies that develops and standardizes technology for home networking over the existing coaxial cables and telephone wiring within homes, so new wires do not need to be installed.

  8. Registered jack - Wikipedia

    en.wikipedia.org/wiki/Registered_jack

    Instead, TIA-968-A incorporates the standard T1.TR5-1999, "Network and Customer Installation Interface Connector Wiring Configuration Catalog", [3] by reference. With the publication of TIA-968-B, the connector descriptions have been moved to TIA-1096-A. [ 4 ] A registered jack name, such as RJ11, still identifies both the physical connectors ...

  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.