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  2. Appliance classes - Wikipedia

    en.wikipedia.org/wiki/Appliance_classes

    In Europe, a double insulated appliance must be labelled Class II or double insulated or bear the double insulation symbol: ⧈ (a square inside another square). As such, the appliance should not be connected to an earth conductor because the high-impedance casing will cause only low-fault currents that are unable to trigger the fusible cut-out.

  3. ISO 3864 - Wikipedia

    en.wikipedia.org/wiki/ISO_3864

    ISO 3864-1:2011 Part 1: Design principles for safety signs and safety markings [1] ISO 3864-2:2016 Part 2: Design principles for product safety labels [2] ISO 3864-3:2012 Part 3: Design principles for graphical symbols for use in safety signs [3] ISO 3864-4:2011 Part 4: Colorimetric and photometric properties of safety sign materials [4]

  4. ISO 7010 - Wikipedia

    en.wikipedia.org/wiki/ISO_7010

    ISO 7010 is an International Organization for Standardization technical standard for graphical hazard symbols on hazard and safety signs, including those indicating emergency exits. It uses colours and principles set out in ISO 3864 for these symbols, and is intended to provide "safety information that relies as little as possible on the use of ...

  5. Portable appliance testing - Wikipedia

    en.wikipedia.org/wiki/Portable_appliance_testing

    Health and safety regulations require that electrical appliances are safe and well maintained to prevent harm to workers. Many equipment manufacturers recommend testing at regular intervals to ensure continual safety, with the interval between tests varying based on both the type of appliance and the environment in which it is to be used.

  6. Globally Harmonized System of Classification and Labelling of ...

    en.wikipedia.org/wiki/Globally_Harmonized_System...

    The pictogram for harmful substances of the Globally Harmonized System of Classification and Labelling of Chemicals.. The Globally Harmonized System of Classification and Labelling of Chemicals (GHS) is an internationally agreed-upon standard managed by the United Nations that was set up to replace the assortment of hazardous material classification and labelling schemes previously used around ...

  7. Insulation system - Wikipedia

    en.wikipedia.org/wiki/Insulation_system

    The different classes are defined by NEMA, [1] Underwriters Laboratories (UL), [2] and IEC standards. For complete electrically operated appliances, the "insulation system" is the overall design of electrical insulation of the energized components to ensure correct function of the device and protection of the user from electric shock .

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  9. Workplace safety standards - Wikipedia

    en.wikipedia.org/wiki/Workplace_Safety_Standards

    Workplace safety symbols are classified in several categories: European hazard pictograms; ADR pictograms, an implementation of the UN recommended labels; GHS hazard pictograms; Green Emergency – emergency exits, escape routes, and on first aid kits ISO 7010

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