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Hazardous Area Electrical Equipment Design & Installation

The Canadian Electrical Code defines hazardous locations as those areas "where fire or explosion hazards may exist due to flammable gases or vapours, flammable liquids, combustible dust, or ignitable fibres or flyings."


Electrical systems in there environments are crucial, but face additional challenges related to the hazards present. Below is a list of different hazard classes and the protective provisions required for electrical equipment:

Class I hazardous locations are those in which vapours or gases may be present. These locations consist of some areas of garages, service stations, certain dry-cleaning plants, spray-painting establishments, flammable gas plants, paints and varnish manufacturing plants, distilleries, plants producing industrial alcohol, industries employing processes with flammable volatile liquids, flammable gases, and compounds such as polishing pastes containing flammable ingredients. Electrical equipment for use in Class I hazardous locations must be approved and marked as being suitable for such zones.

Class II hazardous locations are those in which dust may be suspended in the air to the extent that explosive concentrations may be present. These locations are found in grain elevators, flour mills, feed grinding and mixing plants, coal pulverizing plants, starch plants, magnesium processing plants, etc.

Class III hazardous locations are areas where there are easily-ignitable fibres or flyings present, due to the types of materials being handled, stored, or processed. The fibres and flyings are not likely to be suspended in the air, but can collect around machinery or on lighting fixtures and where heat, a spark or hot metal can ignite them. Some typical Class III locations are Textile mills, cotton gins, Cotton seed mills, flax processing plants; and Plants that shape, pulverize or cut wood and create sawdust or flyings. New and existing electrical equipment in all classes of hazardous locations must be approved and marked as being suitable for these areas.

Hazardous Area Electrical Equipment

How We Can Help

Techtric Engineering can assist you with all your hazardous location class and division design, installation & maintenance requirements.

For more information, please call Call us today on 905 597 5855 or click the Get in Touch button:

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