Hazardous Location Lighting fixtures are classified by the National Electric Code (NEC), whose history goes back to 1897. This is a Life Safety Code, and it is an "American Standard," that means that this Code is officially recognized as representing standard American practice. There are other Codes adopted outside of the USA, but the NEC Code applies to all lighting installed in the USA, and it has been adopted by cities and governmental bodies in an effort to standardize their enforcement of safety standards for lighting.
When in doubt about the rules, regulations and classifications for HazLoc Lighting, the NEC Code is the Bible. Anyone who has anything to do with the electrical industry and lighting fixtures is familiar with the slogan:
"Let the Code Decide."
So, what are the hazards covered by the NEC?
Covered in upcoming Journal #2 - stay tuned.