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2. Electrical equipment in hazardous areas - Wikipedia

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

   A light switch may cause a small, harmless spark when switched on or off. In an ordinary household this is of no concern, but if a flammable atmosphere is present, the arc might start an explosion. In many industrial, commercial, and scientific settings, the presence of such an atmosphere is a common, or at least commonly possible, occurrence.

3. 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.

4. Intrinsic safety - Wikipedia

   en.wikipedia.org/wiki/Intrinsic_safety

   Intrinsically safe mobile phones must meet special battery design criteria in order to achieve UL, ATEX directive, or IECEx certification for use in explosive atmospheres. Only properly designed battery-operated, self-contained devices can be intrinsically safe by themselves. Other field devices and wiring are intrinsically safe only when ...

5. List of IEC technical committees - Wikipedia

   en.wikipedia.org/wiki/List_of_IEC_technical...

   Switches for appliances SC 23K Electrical Energy Efficiency products TC 25: Quantities and units TC 26 Electric welding TC 27: Industrial electroheating and electromagnetic processing TC 28 Insulation co-ordination TC 29 Electroacoustics TC 31 Equipment for explosive atmospheres SC 31G Intrinsically-safe apparatus SC 31J

6. Category:Safety switches - Wikipedia

   en.wikipedia.org/wiki/Category:Safety_switches

   Pertains to electrical switches intended to protect the equipment or end users from harm during fault conditions or other hazardous situations. Subcategories This category has the following 2 subcategories, out of 2 total.

7. Glock switches: How use of small device that makes guns ... - AOL

   www.aol.com/glock-switches-small-device-makes...

   Glock switches — devices as small as a quarter that can be attached to the back of a handgun to make it fire automatically — continue to show up on Columbus streets, Deputy Chief Smith Weir of ...