What are the classifications of electrical hazardous location?
The National Electric Code classifies hazardous locations in three ways: TYPE, CONDITION, and NATURE. There are three types of hazardous conditions: Class I – gas and vapor, Class II dust, and Class III – fibers and flyings. There are two kinds of hazardous conditions: Division 1 – normal, and Division 2 – abnormal.
What is a Class 1 Division 1 hazardous location?
Division 1 is a subset of Class I and is classified as an area where the explosive or flammable gases, vapors or liquids mentioned above can exist under normal, everyday operating conditions.
What is Class II and Class III in hazardous location?
Class I locations are those in which flammable vapors and gases may be present. Class II locations are those in which combustible dust may be found. Class III locations are those which are hazardous because of the presence of easily ignitable fibers or flyings.
What is a Class 2 hazardous location?
Class II Locations The second type of hazardous location is called a “Class II Location”. This classification is created by the presence of combustible dust in the air in sufficient quantities to be explosive or ignitable.
What are classified locations?
A hazardous (classified) location is an area where the possibility of fire or explosion can be created by the presence of flam- mable or combustible gases or vapors, combustible dusts, or easily ignitable fibers/flyings.
What is a Class 1 Division 1 area?
A Class I, Division 1 area encompasses the combination of Zone 0 and Zone 1 areas. An area where ignitable concentrations of flammable gases, vapors or liquids are present continuously or for long periods of time under normal operating conditions.
What are the divisions of class 2 hazardous materials?
Class 2 has three divisions: Flammable (also called combustible), Non-Flammable/Non-Poisonous, and Poisonous.
How are hazardous locations defined in Canadian Electrical Code?
The Canadian Electrical Code defines three classes of hazard: * Class I – Flammable Vapours * Class II – Combustible Dusts * Class III – Ignitable Fibres and Flyings. Once the class of hazardous location is known, it is then identified as a zone within the plant or the facility. Class I hazardous locations are identified by zones as follows:
What are the three classes of hazards in Canada?
The Canadian Electrical Code defines three classes of hazard: * Class III – Ignitable Fibres and Flyings. Once the class of hazardous location is known, it is then identified as a zone within the plant or the facility. Class I hazardous locations are identified by zones as follows:
What makes an area a hazardous area in Canada?
The National Electrical Code (NEC) and the Canadian Electrical Code (CEC) defines hazardous areas as the following: An area where a potential hazard (e.g., a fire, an explosion, etc.) may exist under normal or abnormal conditions because of the presence of flammable gases or vapors, combustible dusts or ignitable fibers or flyings.
How does the Hazardous Area Classification system work?
The hazardous area classification system determines required protection techniques and methods for electrical installations in the location. The Class/Division/Group system is based on Article 500 of the National Electrical Code (NEC) where Class defines the general nature (or properties) of the hazardous material in the surrounding atmosphere.
