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  2. Rheem Manufacturing Company - Wikipedia

    en.wikipedia.org/wiki/Rheem_Manufacturing_Company

    Rheem is headquartered in Atlanta, Georgia, and is an independent subsidiary of Paloma Industries. [1] [2] Rheem started in 1925 as a packaging supplier to the petroleum industry. The company also manufacturers of water heating and HVAC equipment in the United States.

  3. NEMA wattage label - Wikipedia

    en.wikipedia.org/wiki/NEMA_wattage_label

    A sticker that is half-red and half-white indicates a pulse start metal halide lamp (PSMH). Green is also used on HPS units in Canada. Gray indicates that the fixture is of an LED type. In addition to being colour-coded, newer NEMA stickers also state the lamp type abbreviation just below the lamp's wattage (e.g. HPS, LED).

  4. List of electronic color code mnemonics - Wikipedia

    en.wikipedia.org/wiki/List_of_electronic_color...

    The first letter of the color code is matched by order of increasing magnitude. The electronic color codes, in order, are: The electronic color codes, in order, are: 0 = B lack

  5. Electronic color code - Wikipedia

    en.wikipedia.org/wiki/Electronic_color_code

    A 2.26 kΩ, 1%-precision resistor with 5 color bands (), from top, 2-2-6-1-1; the last two brown bands indicate the multiplier (×10) and the tolerance (1%).. An electronic color code or electronic colour code (see spelling differences) is used to indicate the values or ratings of electronic components, usually for resistors, but also for capacitors, inductors, diodes and others.

  6. List of LED failure modes - Wikipedia

    en.wikipedia.org/wiki/List_of_LED_failure_modes

    Reverse bias: Although the LED is based on a diode junction and is nominally a rectifier, the reverse-breakdown mode for some types can occur at very low voltages and essentially any excess reverse bias can cause immediate degradation, and may lead to vastly accelerated failure. 5 V is a typical maximum reverse bias voltage specification for ...

  7. R-454B - Wikipedia

    en.wikipedia.org/wiki/R-454B

    R-454B, also known by the trademarked names Opteon XL41, Solstice 454B, and Puron Advance, is a zeotropic blend of 68.9 percent difluoromethane (R-32), a hydrofluorocarbon, and 31.1 percent 2,3,3,3-tetrafluoropropene (R-1234yf), a hydrofluoroolefin. [1]

  8. Resin identification code - Wikipedia

    en.wikipedia.org/wiki/Resin_identification_code

    The Resin Identification Code (RIC) is a technical standard with a set of symbols appearing on plastic products that identify the plastic resin out of which the product is made. [1] It was developed in 1988 by the Society of the Plastics Industry (now the Plastics Industry Association ) in the United States, but since 2008 it has been ...

  9. Pilot light - Wikipedia

    en.wikipedia.org/wiki/Pilot_light

    In natural gas furnaces, water heaters, and room heating systems, a safety cut-off switch is normally included so that the gas supply to the pilot and heating system is shut off by an electrically operated valve if the pilot light goes out. This cut-off switch usually detects the pilot light in one of several ways: A flame rectification device. [2]