Here’s a safety riddle for you:
What do 1910.307(g)(4)(i), Hazardous Locations, Zones, and Professional Engineers have in common?
Answer: They are ALL required when your facility has Hazardous Locations using “zones” rather than divisions (e.g. Class I, II, and III areas) to classify an area.
In 2007 OSHA did a major revisions of their Electrical Standards and a couple of these revisions were to 1910.307 Hazardous (classified) locations, one of these was the addition of (g)…