Motors that satisfy UL explosion proof certification are clearly identifiable by a UL listing identification plate, affixed to the motor enclosure. The plate defines the class, division and group compliance of the motor.
Is a Class 1 Div 2 motor explosion proof?
While Division 1 motors in Class I locations must be explosion-proof, Class II, Division 1 motors must be dust- ignition-proof. … One important distinction is that the enclosure of a dust-ignition- proof motor is designed to exclude hazardous materials.
What are explosion proof motors used for?
In a Class I environment (UL designation), an explosion proof motor prevents an internal spark or flame from escaping the motor into the hazardous environment to ignite a flammable vapor or gas.
What is an exp motor?
Explosion Proof motors are designed for use in hazardous environments having certain explosive gases or materials present. When choosing an Explosion Proof motor, it is important to select a motor that is approved for use in the specific class and group that defines the hazardous environment the motor will run in.
What is the difference between Class 1 Div 1 and Div 2?
Class 1 Hazardous Locations refer to facilities which deal with flammable gases, vapors, and liquids. Division 2 specifies that these flammable materials are handled, processed, or used in the defined hazardous location, but are not normally present in concentrations high enough to be ignitable.
What is meant by explosion proof?
Explosion proof, according to the National Electrical Code, applies to an apparatus enclosed in a case that is capable of withstanding a gas or vapor explosion. It means that, should there be an explosion, it will be contained within an enclosure.
What is gas group?
Different explosive atmospheres (gases, vapours and dusts) will have different properties including flame temperature, minimum ignition energy, upper and lower explosive limits, and molecular weight. These properties will determine the likelihood and severity of an explosion.
Is a brushless motor intrinsically safe?
The POST committee consulted with a well known tool manufacturer who confirmed that cordless tools, including models with brushless motors are not intrinsically safe and have the potential to spark. Therefore, hot work protocols must be followed when using cordless tools when working under these conditions.