What is a Division 2 hazardous area?

Division 2 is also a subset of Class I and is classified as an area where the explosive or flammable gases, vapors or liquids mentioned above are not likely to exist during regular operation.

What are the 3 classes of hazardous locations?

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.

Does Class 2 Div 2 require explosion proof?

As with the use of explosion-proof motors in Class I, Division 2 environments, dust-ignition-proof motors are acceptable, but not necessary, in Class II, Division 2 areas.

What is zone classification?

Zone 1: An area in which an explosive gas atmosphere is likely to occur in normal operation; Zone 2: An area in which an explosive gas atmosphere is not likely to occur in normal operation and, if it occurs, will only exist for a short time.

What is gas group IIA IIB IIC?

– Group IIA—Atmospheres containing propane, or gases and vapors of equivalent hazard. – Group IIB—Atmospheres containing ethylene, or gases and vapors of equivalent hazard. – Group IIC—Atmospheres containing acetylene or hydrogen, or gases and vapors of equivalent hazard.

Is IIC better than IIB?

Gases in Gas Group IIA require a higher ignition energy than Gas Group IIB. Gases in Gas Group IIC require the lowest ignition energy to ignite. As the table below shows, there are only 5 gases in Group IIC. Certifying your product for Gas Group IIA & IIB is usually sufficient to cover 98% of the market.

What is gas Group IIC?

– Group IIC—Atmospheres containing acetylene or hydrogen, or gases and vapors of equivalent hazard.

What is a Class 2 explosive?

Hazard Class 2 – Gases Flammable gases (2.1) burn readily in air and are in a gaseous state at 68°F (e.g., propane and spray paints). Non-flammable gases (2.2) may include liquified gases or cryogenic liquids (e.g., helium and asthma inhalers).

What is a Class 2 motor?

Class: Location 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.

Is gas Group IIC better than IIA?

Auto Ignition Temperature or “T” Rating The hazard level of the gases increases from gas group IIA to IIC with group IIC being the most severe.

Is gas Group IIC better than IIB?

Any equipment which is marked as IIC can be used in atmospheres that contain Group IIB and Group IIA gasses. Conversely equipment marked IIA cannot be used in IIB or IIC explosive environments….Gas Groups.

Can IIB be used in IIC?

Therefore, normally, are used IIB junction boxes even for the IIA. For the IIC Group, the flame-path cannot be flat for junction boxes with volumes greater than 0.5 liters, but must be cylindrical and, therefore, the construction technology of the IIC enclosures must necessarily be different than IIB junction boxes.

Which is better gas group IIA or IIB?

What is a Class 2 material?

Class 2 dangerous goods are gases. It covers compressed gases, liquefied gases, dissolved gases, refrigerated liquefied gases, mixtures of gases and aerosol dispensers/articles containing gas.

What is Class 2 compressed gas?

Class 2 – Compressed Gases (49 CFR 173.115) Division 2.1 – Flammable Gas – A material that is a gas at 20º C or below and. 101.3 kPa of pressure (ambient temperature and pressure), i.e. the material has a. boiling point of 20º C at sea level and: • Is ignitable when in a mixture of 13 percent or less by volume with air …

What is a Class 1 Div 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.

What does Class 1 Group D mean?

Class I Group D locations are atmospheres containing elements such as Gasoline, Hexane, Naphtha, Benzine, Butane, Propane, Alcohol, Acetone, Benzol, Lacquer Solvent Vapors or Natural Gas.

Is IIB better than IIA?

What is a Class 2.1 substance?

Little Pro on 2016-01-07 96731. Class 2 dangerous goods are gases. It covers compressed gases, liquefied gases, dissolved gases, refrigerated liquefied gases, mixtures of gases and aerosol dispensers/articles containing gas. There are 3 sub-divisions: Division 2.1: Flammable gases.

What are the divisions of class 2 hazardous materials?

Class 2 has three divisions: Flammable (also called combustible), Non-Flammable/Non-Poisonous, and Poisonous. This classification is based on the United Nations’ Recommendations on the Transport of Dangerous Goods – Model Regulations.

What are the divisions of class 2 gases?

Are all TEFC motors explosion proof?

TEFC motors are not secure against high pressure water nor submersible. They are also not explosion proof without additional modifications.

What is Class 2 compressed?

Gases that are known to cause these and other health risks are known as Class 2 Compressed Gases, and fall within one of three divisions: 2.1 Flammable gas. 2.2 Non-flammable, non-poisonous. 2.3 Poisonous gas.

Can Tefc motors be used outdoors?

A totally enclosed, fan-cooled (TEFC) motor is much more adaptable to outdoor locations and high moisture areas. With a bit of care, you can expect this type of motor to work well and have a long life.

What is the difference between TEFC and TENV motors?

Totally Enclosed, Fan-Cooled (TEFC) Motors have an external fan which circulates outside air to the motor. Totally Enclosed, Nonvented (TENV) Motors do not have air openings. While air does not freely move between the inside and outside, the motor’s construction is not air- or liquid-tight.