Log In Sign Up

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

Classification Basics

What Is A Classified Area?

Hazardous or Classified?

The terms "hazardous" and "classified" have different meanings to different people. Many people think that a "hazardous location" is a confined space or a place where they might be exposed to toxic materials. To others, a hazardous location is somewhere that explosionproof wiring is required. Classified areas are, literally, areas that have been classified, so there is less room for misinterpretation. Nevertheless, many individuals think that classified does not convey the extra risk or special rules that are implied by calling an area hazardous. In the NEC, the terms are used interchangeably. In fact, the title of Article 500 starts with "Hazardous (Classified) Locations." In this program, classified is generally used, but either term is correct. In NEC language, areas that are not hazardous locations may be referred to as not classified, unclassified, ordinary, non-hazardous or may be classified as "unclassified." classified as "unclassified."
Section 500.5(A) says the areas containing ammonia refrigeration systems may be "classified as unclassified."
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...