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Sometimes we need to construct, purchase, or install electrical equipment for a hazardous location where there is a risk of a fire or explosion. It is therefore critical that we have enough knowledge to address the risks involved. • Hazardous locations are classified in North America, using two different classification systems: the Class-division and Zone systems. • “Class I, Division 1”, and “Class I, Division 2” are two such classifications for gas explosive atmospheres. This animation focuses on “Class I, Division 1”. • Class I means that the location contains flammable gases, flammable liquid-produced vapours, or combustible liquid produced vapours. • Division 1 refers to an area in which these dangerous concentrations of flammable gases, vapors, or mists exists continuously, for long periods of time, or frequently under normal operating conditions. • Electrical devices must still be installed and used within these environments! • Let’s look together at an example of a Class I hazardous area. This illustration shows a gasoline tank with a fixed roof and vent. Both Division 1 and 2 locations are shown. • Notice that the Division 1 location is inside the tank above the flammable liquid where a gas vapour could exist and outside the storage tank, in the area immediately around the tank’s vent. • In order to be certified as compliant with safety Standards for Class I, Division 1, the product must be protected by one or more of the following three protection techniques: intrinsic safety, explosion proof, and purging and pressurization Type X or Y. • Please see our other videos to learn more about other classified areas, as well as the protection techniques that are specific to them. • If you are a product designer, or a buyer, and need an electrical device that has been certified for “Class I, Division 1”, the Hazloc Directory website can help! • Hazloc Directory is the world's most trusted source of information about hazardous location products manufacturers. • Please visit our website for more details: https://www.hazlocdirectory.com • Background Music: https://www.bensound.com
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