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  2. Zone valve - Wikipedia

    en.wikipedia.org/wiki/Zone_valve

    For electrical zone valves, the motor is often a small shaded-pole synchronous motor combined with a rotary switch that can disconnect the motor at either of the two stopping points ("valve open" or "valve closed"). In this way, applying power to the "open valve" terminal causes the motor to run until the valve is open while applying power at ...

  3. IEC 60446 - Wikipedia

    en.wikipedia.org/wiki/IEC_60446

    The international standard IEC 60446 Basic and safety principles for man-machine interface, marking and identification - Identification of equipment terminals, conductor terminations and conductors was a standard published by the International Electrotechnical Commission (IEC) that defined basic safety principles for identifying electrical conductors by colours or numerals, for example in ...

  4. 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.

  5. Honeywell - Wikipedia

    en.wikipedia.org/wiki/Honeywell

    Honeywell is a Fortune 500 company, ranked 115th in 2023. [3] In 2024, the corporation had a global workforce of approximately 102,000 employees. [1] [4] As of 2020, the current chairman and chief executive officer is Vimal Kapur. [5] The corporation's name, Honeywell International Inc., is a product of the merger of Honeywell Inc. and ...

  6. Pipe marking - Wikipedia

    en.wikipedia.org/wiki/Pipe_marking

    This is ISO 14726:2008 Ships and marine technology — Identification colours for the content of piping systems. [13] This is a two-colour banded marking system. The main colour shows what the fluid is being used for. This is on either side of the secondary colour which indicates what the substance actually is. The main colours are as follows: [13]

  7. Electrical wiring in North America - Wikipedia

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

    Special wiring rules apply to wet or corrosive locations, [13] and to locations which present an explosion hazard. [14] Wiring materials for use in the United States must generally be made and tested to product standards set by NEMA and Underwriters Laboratories (UL) and must bear approval marks such as those set by UL.

  8. DIN 47100 - Wikipedia

    en.wikipedia.org/wiki/DIN_47100

    DIN Standard DIN 47100 regulated the color-coding for the identification of cores in telecommunication cables. The standard was withdrawn without a replacement in November 1998, but remains in widespread use by cable manufacturers. The isolations of the several wires in a cable are either solidly colored in one color, or striped lengthwise in ...

  9. Reduced pressure zone device - Wikipedia

    en.wikipedia.org/wiki/Reduced_pressure_zone_device

    A reduced pressure zone device (RPZD, RPZ, or RPZ valve) is a type of backflow prevention device used to protect water supplies from contamination. RPZDs may also be known as reduced pressure principle (RP), reduced pressure principle backflow prevention devices , [ 1 ] [ 2 ] reduced pressure zone assemblies (RPZA), [ 3 ] or reduced pressure ...

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