Class I locations are those where gases and fumes are present.
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What is a Class 1 location NEC?
Facilities that deal with flammable gases, vapors, and liquids are classified as Class 1 hazardous locations. The flammable materials are handled, processed, or used in a hazardous location, but are not usually present in concentrations high enough to beignitable.
Does Class 1 Div 1 require explosion proof?
Class I locations must be explosion-proof, Class II locations must be dust-proof, and Division 1 motor must be dust-proof. The motor’s enclosure is designed to exclude hazardous materials.
What is a Zone 1 hazardous area?
Zone 1 is an area where an explosion is likely to occur in normal operation, and Zone 2 is an area where an explosion is not likely to happen in normal operation.
What is the difference between Class 1 Div 1?
Under normal, everyday operating conditions, 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 be found.
How do you know if something is intrinsically safe?
Equipment that is dissipating less than 1.3 W is considered to be safe because it won’t get hotter than 135C. Sending a signal out of or into the hazardous area is required for most applications.
What is a Class 2 hazardous location?
There are two types of hazardous locations, the second being called a Class II location. The classification is created by the presence of dust in the air that is sufficiently large to make it explode.
What is Class II and Class III in hazardous location?
Class I locations are those where fumes and gases can be seen. Class II locations have the possibility of being found with dust. Class III locations have fibers or flyings that are hazardous.
Does Class 2 Div 2 require explosion proof?
Class I locations must be explosion-proof, Class II locations must be dust-proof, and Division 1 motor must be dust-proof.
What is a Category 2 location?
There are locations in which the dust may or may not be sufficient to make a mixture of explosives.
What is a Class III Division 1 location?
There is a subset of Class III called Division 1 whereignitable fibers or flyings can be manufactured, stored or handled. ignitable fibers or flyings can be stored or handled in Division 2.
What is a Class 3 hazardous location?
Class III hazardous locations are areas where there are Easily ignitable fibers or flyings present because of the types of materials being handled, stored, or processed.
What are the three NEC hazardous area classifications?
There are three different criteria types for hazardous places.
How do you classify hazardous locations?
The hazardous locations are categorized by class, group, and division. There are areas in class I where there areflammable gas, vapor, or liquid. The areas where dust is present are classified as Class II. There are areas whereignitable fibers are present.
What is Gas Group IIC?
Atmospheres containing acetylene or hydrogen or gases and vapors of equivalent hazard are included in the group IIC.
What is a Class 1 Division 1 hazardous location?
What is an example of a Class 1 Division 2 location?
Class I locations are those where there are fumes or gases. Class II locations have the possibility of being found with dust.
What is a Class I Division II location?
Class I, Division 2 includes locations where volatile flammable liquids or flammable gases are used, but which would become hazardous in case of an accident or unusual operating condition.
What is a Class 1 Division 1 area?
There is a Class I, Division 1 area that includes Zone 0 and Zone 1. The area where ignitable concentrations of flammable gases, vapors or liquids are present continuously or for a long period of time under normal operating conditions.
What is the difference between Class 1 and Class 2 electrical equipment?
The class 1 appliances are subjected to Earth continuity and insulation resistance tests. Two layers of insulation are used to protect the user of an appliance. Double insulated is a class 2 appliance.