What is a Class 1 motor?

Based on these classifications, Class I, Division 1 motors are built to operate in environments routinely exposed to significant quantities of potentially explosive atmospheric gases or vapors. They must be built and labeled as explosion-proof.

What is a Class 1 Division 2 motor?

Class I, Division 2. This classification usually includes locations where volatile flammable liquids or flammable gases or vapors are used, but which, in the judgment of the authority having jurisdiction, would become hazardous only in case of an accident or of some unusual operating condition.

Is a Class 1 Div 2 motor explosion-proof?

Class I — Class I locations contain gases and vapors that are known to auto-ignite and cause explosions. Gasoline and acetylene are common examples of such vapors. Class II — Class II locations involve the presence of flammable dust, like grain and coal, in the environment.

What is EXD motor?

Ex d – Explosion proof motors (class of temperature T4) Ex de – Explosion proof motors with increased safety terminal box (class of temperature T4)

What is UL class1?

Class I – Flammable gases, flammable liquid-produced vapors, and combustible liquid-produced vapors.

Is a Tefc motor explosion proof?

The enclosure is “Totally Enclosed”. This means that the motor is dust tight, and has a moderate water seal as well. TEFC motors are not secure against high pressure water nor submersible. They are also not explosion proof without additional modifications.

What is UL Class1?

How can you tell if a motor is explosion proof?

An explosion proof motor is clearly marked with a nameplate that identifies its suitability for a given hazardous environment. Depending on the agency certifying the motor, the nameplate will clearly indicate the hazardous location Class, Division, and Group for which the motor is suited.

What is the difference between EXE and EXD?

Exe enclosures, also known as ‘increased safety’ enclosures, are typically the cheaper option, while Exd enclosures offer the additional safeguard of containing any flames. The final decision may be based on the characteristics of the surrounding atmosphere, including its temperature T-rating.

What is class F motor insulation?

Motors rated as class “F/B” have a maximum winding temperature equal to that of insulation class F (155 degrees C), but an allowable temperature rise of insulation class B (80 degrees C), giving an additional 25 degree safety margin.