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  2. Flashlight - Wikipedia

    en.wikipedia.org/wiki/Flashlight

    People working in hazardous areas with significant concentrations of flammable gases or dusts, such as mines, engine rooms of ships, chemical plants, or grain elevators, use "nonincendive", "intrinsically safe", or "explosion-proof" flashlights constructed so that any spark in the flashlight is not likely to set off an explosion outside the ...

  3. Electrical equipment in hazardous areas - Wikipedia

    en.wikipedia.org/wiki/Electrical_equipment_in...

    Unlike ATEX which uses numbers to define the safety "Category" of equipment (namely 1, 2, and 3), the IEC continued to utilise the method used for defining the safe levels of intrinsic safety namely "a" for zone 0, "b" for zone 1 and "c" for zone 2 and apply this Equipment Level of Protection to all equipment for use in hazardous areas since ...

  4. Intrinsic safety - Wikipedia

    en.wikipedia.org/wiki/Intrinsic_safety

    Intrinsic safety (IS) is a protection technique for safe operation of electrical equipment in hazardous areas by limiting the energy, electrical and thermal, available for ignition. In signal and control circuits that can operate with low currents and voltages, the intrinsic safety approach simplifies circuits and reduces installation cost over ...

  5. Inherent safety - Wikipedia

    en.wikipedia.org/wiki/Inherent_safety

    (Kletz originally used the term intrinsically safe in 1978, but as this had already been used for the special case of electronic equipment in potentially flammable atmospheres, only the term inherent was adopted. Intrinsic safety may be considered a special subset of inherent safety). In 2010 the American Institute of Chemical Engineers ...

  6. Safety lamp - Wikipedia

    en.wikipedia.org/wiki/Safety_lamp

    Exhaust gases passed out through water. The lamp was intrinsically safe provided it was kept upright, but gave out only a weak light. It was heavy and ungainly and required a man to pump it continuously. It was not a practical success, and Clanny subsequently changed the basis of operation of later lamps in the light of the Davy and Stephenson ...

  7. Foundation Fieldbus H1 - Wikipedia

    en.wikipedia.org/wiki/Foundation_Fieldbus_H1

    A more recent enhancement for intrinsically safe applications is the High Power Trunk (HPT) with field-based field barriers (FBs), which limits power at the spur, rather than the trunk. This method significantly changes the equation for end users of Fieldbus in hazardous settings.

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