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Learn about the standards, regulations, and terminology for electrical equipment in hazardous locations where fire or explosion hazards may exist. Find out the difference between Class I, Division 1 and 2, and Zone 0 and 1, and how they are used in different countries.
ATEX directives are EU laws that regulate the safety and health protection of workers and equipment in potentially explosive atmospheres. They cover equipment categories, zones, temperature classes, and certification procedures for different types of explosive atmospheres.
Learn about the safety standards, design and installation requirements, and colour-coding of electrical wiring in different regions and countries. Compare the wiring practices and codes of Australia, New Zealand, Europe, UK, North America, and more.
MESG is a measurement of how easily a gas flame will pass through a narrow gap bordered by heat-absorbing metal. It is used to classify flammable gases and design electrical equipment in hazardous areas.
O: Indicates that these materials may not be loaded, transported or stored together in the same transport vehicle or storage facility during the course of transportation, unless separated in a manner that, in the event of leakage from packages under conditions normally incident to transportation, commingling of hazardous materials would not occur.
Learn about the history and meaning of hazard symbols, such as the skull and crossbones for poison, the trefoil for radiation, and the exclamation mark for generic warning. See examples of different types and styles of hazard symbols used in various contexts and regions.
RoHS is an EU directive that limits the use of certain hazardous substances in electrical and electronic equipment. It covers ten substances, such as lead, mercury and cadmium, and sets maximum permitted concentrations for each product.
Learn about the standards and ratings of electrical enclosures used in North America, defined by the National Electrical Manufacturers Association (NEMA). Find out the characteristics, environmental conditions, and applications of each NEMA enclosure type.