CSA Group is your expert source for testing & certification of equipment used in hazardous locations across North America. We will help you obtain the CSA North American certification mark which is widely recognized by regulatory authorities in the U.S. and Canada at the federal, state, provincial and local levels. You will be working with technical experts who will leverage their experience derived from a solid understanding of the required standards.
Definition for hazardous locations in North America
In North America, hazardous locations have traditionally been defined by a combination of classes and divisions as follows:
- Class I – A location made hazardous by the presence of flammable gases or vapors that may be present in the air in quantities sufficient to produce an explosive or ignitable mixture
- Class II – A location made hazardous by the presence of combustible or electrically conductive dust
- Class III – A location made hazardous by the presence of easily ignitable fibers or flyings in the air, but not likely to be in suspension in quantities sufficient to produce ignitable mixtures
- Division 1 – A location where a classified hazard exists or is likely to exist under normal conditions
- Division 2 – A location where a classified hazard does not normally exist but is possible to appear under abnormal conditions
North American transition to the zone system
The U.S. and Canada have recently revised installation codes to recognize an international 3-Zone area classification system for equipment used in hazardous locations.
- Zone 0 – An area in which an explosive gas atmosphere is continuously present for a long period of time
- Zone 1 – An area in which an explosive atmosphere is likely to occur in normal operation
- Zone 2 – An area in which an explosive gas atmosphere does not normally exist.
In Canada, all new installations must use the 3-Zone system. Existing installations may continue to use the 2-Division system or opt to re-classify using the 3-Zone system.
In the U.S., all installations (both new and existing) can either continue using the 2-Division system or re-classify their product using the 3-Zone system.
Recognition and accreditation
CSA Group’s U.S. and Canadian accreditations provides you with a single source for access to the North American market. In the U.S., we are recognized by the Occupational Safety and Health Administration (OSHA) as a Nationally Recognized Testing Laboratory (NRTL) to test & certify equipment used in hazardous locations to applicable U.S. standards for both division and zone systems recognized by the National Electrical Code (NEC). We are also a recognized testing laboratory by the U.S. Coast Guard (USCG).
In Canada, we are accredited by the Standards Council of Canada (SCC) to test & certify equipment used in hazardous locations to applicable Canadian standards for both division and zone systems recognized by the Canadian Electrical Code (CEC).