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  2. Three-prong adaptor - Wikipedia

    en.wikipedia.org/wiki/Three-prong_adaptor

    Three-prong plugs do not fit into the older, two-prong receptacles. [7] When used as intended, the ground pin of the 3-wire receptacle is to be connected to a grounded cover screw, or to an external ground. In 1969, Underwriters Laboratories mandated three-prong plugs on major appliances for safety. [7]

  3. Gender of connectors and fasteners - Wikipedia

    en.wikipedia.org/wiki/Gender_of_connectors_and...

    Schematic symbols for male and female connector pins. In electrical and mechanical trades and manufacturing, each half of a pair of mating connectors or fasteners is conventionally assigned the designation male or female, [1] a distinction referred to as its gender. [2] The female connector is generally a receptacle that receives and holds the ...

  4. DC connector - Wikipedia

    en.wikipedia.org/wiki/DC_connector

    Known as Kycon 3-pin and 4-pin DC power plugs. Erroneously also known as "Power DIN", [4] although different from any standardized Mini-DIN or DIN connector type. The male plug's mating shell outer diameter is 10 mm (0.39 in), and the pins are 1.5 mm (0.059 in) diameter; Standard may include a limit of 20 V at 7.5 amperes [5]

  5. Electrical connector - Wikipedia

    en.wikipedia.org/wiki/Electrical_connector

    When working with multi-pin connectors, it is helpful to have a pinout diagram to identify the wire or circuit node connected to each pin. Some connector styles may combine pin and socket connection types in a single unit, referred to as a hermaphroditic connector. [6]: 56 These connectors includes mating with both male and female aspects ...

  6. IEC 60309 - Wikipedia

    en.wikipedia.org/wiki/IEC_60309

    The pilot pin is located in the centre of main contact circle on 4- and 5-pin connectors. On 3-pin (2P+E) connectors, it is located on the contact circle opposite the ground pin. The other connectors are located 105° on either side of the earth pin, rather than 120° as in the smaller variants, to make room for the pilot pin.

  7. Coaxial power connector - Wikipedia

    en.wikipedia.org/wiki/Coaxial_power_connector

    2.1 mm center pin Common on guitar effect pedals Arduino power adapter IEC 60130-10 Type A (first of two with same type and same OD, the other has ID of 2.5mm and center PIN) 5.50 2.10 CUI Inc. P10 Kobiconn 7391 Philmore 2560 Switchcraft 768K [8] 2.1 mm center pin, lock-ring: 5.50 2.10 Kobiconn 0721-EX Kobiconn 1000-EX (panel) 2.1 mm center pin ...