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2. 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 ...

3. Metal hose - Wikipedia

   en.wikipedia.org/wiki/Metal_hose

   Electrical industry and mechanical engineering: as a protective hose for electrical cables or light conductors; As a suction, conveying and coolant hose, e.g. when conveying and transporting liquid gas; Automotive industry: as an exhaust gas hose that acts as a vibration decoupler in exhaust systems; As a ventilation hose in technical building ...

4. Twist-on wire connector - Wikipedia

   en.wikipedia.org/wiki/Twist-on_wire_connector

   Twist-on wire connectors are a type of electrical connector used to fasten two or more low-voltage (or extra-low-voltage) electrical conductors. They are widely used in North America and several European countries in residential, commercial and industrial building power wiring, but have been banned in some other jurisdictions.

5. 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 ...

6. Gender of connectors and fasteners - Wikipedia

   en.wikipedia.org/wiki/Gender_of_connectors_and...

   Electrical power outlets are female for safety. In electrical connections where voltage or current is sufficient to cause injury, the part permanently connected to the power source is invariably female, with concealed contacts, to prevent inadvertent touching of live conductors by people or animals, or by conductive items that may cause a short ...

7. Steel-toe boot - Wikipedia

   en.wikipedia.org/wiki/Steel-toe_boot

   A pair of well-worn steel-toe shoes A pair of ISO 20345:2004 compliant S3 safety boots. A steel-toe boot (also known as a safety boot, steel-capped boot, steel toecaps or safety shoe) is a durable boot or shoe that has a protective reinforcement in the toe which protects the foot from falling objects or compression. Safety shoes are effective ...