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  2. 25-pair color code - Wikipedia

    en.wikipedia.org/wiki/25-pair_color_code

    The color combinations are applied to the insulation that covers each conductor. Typically, one color is a prominent background color of the insulation, and the other is a tracer, consisting of stripes, rings, or dots, applied over the background. The background color always matches the tracer color of its paired conductor, and vice versa.

  3. Pipe marking - Wikipedia

    en.wikipedia.org/wiki/Pipe_marking

    Example of pipe marking through colors and symbols (arrows) to indicated pipe contents (colors) and flow direction (arrows). Pipe marking on a natural gas pipe

  4. List of RAL colours - Wikipedia

    en.wikipedia.org/wiki/List_of_RAL_colours

    Mandatory for all steel work in P&G / mandatory for taxis in Germany since 1971, although in limited states only in recent years. RAL 1016: Sulfur yellow: Standard European ambulance colour in accordance with CEN 1789. [2] RAL 1017: Saffron yellow: RAL 1018: Zinc yellow: RAL 1019: Grey beige: RAL 1020: Olive yellow: RAL 1021: Colza yellow

  5. Electrical wiring in North America - Wikipedia

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

    When running through conduit, such as in commercial applications, it is typical to pull individual wires rather than a preassembled cable. Wire is manufactured in a range of conductor sizes, stranding, and materials (copper or aluminum), [ 15 ] but the term "wire type" usually refers to the insulation , which determines the environments in ...

  6. Galvanic series - Wikipedia

    en.wikipedia.org/wiki/Galvanic_series

    The unshaded bars indicate the location on the chart of those steels when in acidic/stagnant water ( like in the bilge ), where crevice-corrosion happens. Notice how the *same* steel has much different galvanic-series location, depending on the electrolyte it's in, making prevention of corrosion .. more difficult.

  7. Electrical wiring - Wikipedia

    en.wikipedia.org/wiki/Electrical_wiring

    The metal sheath was bonded to each metal wiring device to ensure earthing continuity. A system developed in Germany called "Kuhlo wire" used one, two, or three rubber-insulated wires in a brass or lead-coated iron sheet tube, with a crimped seam.

  8. Color chart - Wikipedia

    en.wikipedia.org/wiki/Color_chart

    Color chips or color samples from a plastic pellet manufacturer that enables customers to evaluate the color range as molded objects to see final effects. A color chart or color reference card is a flat, physical object that has many different color samples present. They can be available as a single-page chart, or in the form of swatchbooks or ...

  9. Electrical wiring in the United Kingdom - Wikipedia

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

    A conductor that provides a connection to Earth for safety and protection purposes, for both end-user devices and metal objects and components in the installation. Colour-coded green/yellow striped, though may be bare (uninsulated) within sheathed cable (pre-1976: solid green). Conduit A form of wire containment comprising plastic or metal tubing.