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  2. Electrical wiring in the United Kingdom - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring_in_the...

    Electrical installations Wiring practice by region or country North American practice United Kingdom practice Regulation of electrical installations BS 7671 UK wiring regulations IEC 60364 IEC international standard Canadian Electrical Code (CE Code) U.S. National Electrical Code (NEC) Cabling and accessories AC power plugs and sockets Cable tray Electrical conduit Mineral-insulated copper ...

  3. BS 7671 - Wikipedia

    en.wikipedia.org/wiki/BS_7671

    Three-phase colours changed to red, white and blue; black for neutral or earth. Revised in 1943; reprint with minor amendments in 1945; supplement issued in 1946; revision to section 8 in 1948. 1950 12th IEE Three-phase colours of red white and blue; black for neutral or earth in fixed wiring; green earth in flex. Supplement issued 1954.

  4. Three-phase electric power - Wikipedia

    en.wikipedia.org/wiki/Three-phase_electric_power

    Three-phase transformer with four-wire output for 208Y/120 volt service: one wire for neutral, others for A, B and C phases. Three-phase electric power (abbreviated 3ϕ [1]) is a common type of alternating current (AC) used in electricity generation, transmission, and distribution. [2]

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

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

    BS 546, Two-pole and earthing-pin plugs, socket-outlets and socket-outlet adaptors for AC (50–60 Hz) circuits up to 250 V is an older British Standard for three-pin AC power plugs and sockets. Originally published in April 1934, it was updated by a 1950 edition which is still current, [ 1 ] with eight amendments up to 1999.

  6. File:Wiring diagram of 3-phase transfer switch.JPG - Wikipedia

    en.wikipedia.org/wiki/File:Wiring_diagram_of_3...

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  7. Electrical system design - Wikipedia

    en.wikipedia.org/wiki/Electrical_system_design

    One-line diagrams represent the three or four conductors of three-phase power circuits with one line. Wiring diagrams are sometimes made. These show and name the termination points and names of each conductor. In some systems, enough information can be put onto the schematics so that wiring diagrams are not needed.

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  9. Electrical code - Wikipedia

    en.wikipedia.org/wiki/Electrical_code

    Installation wiring: (section 3.8.1) recommended for single phase [d] recommended for multiphase While light blue is prohibited from use for active function, dark blue is recommended for L3. usually used for "Switched Line" [19] To designate any phase, the below colours are prohibited: [d] [e] (before 1980) (before 1966)