Log In Sign Up

NOTE: This is an unformatted excerpt from our online fire protection training library.

Classification Basics

Electrical Equipment

Special Equipment Requirements

Equipment and wiring methods used in classified areas must be specially designed and installed in such a way that the operation of the electrical equipment will not provide an ignition source for the hazardous materials or atmosphere. In all cases, surface temperatures must be controlled and arcs and sparks must be contained. In areas classified due to the presence of gases or vapors, the special equipment must withstand internal explosions and control the release of hot gases withstand internal explosions and control the release of hot gases
This is the primary design criteria for explosionproof enclosures because it is assumed that gases or vapors will get inside the enclosures and will be ignited by the enclosed equipment. but is not expected to exclude gases or vapors. In areas classified due to dust, fibers, or flyings, the equipment must exclude the dust, fibers, and flyings.

An explosionproof panelboard. (Courtesy of Appleton Electric Company, EGS Electrical Group)
NOTE: This is an unformatted excerpt from our online fire protection training library.

Contact Us:

Please fill in the fields below:

    Privacy Policy
    Please choose all that interest you.

    Contact Customer Service at AcademySupport@jensenhughes.com or 800-930-9414 option 1.

    Our regular support hours are 9:00 AM to 5:00 PM, Monday through Friday, except holidays...