receptacle above grade in hazardous location
receptacle above grade in hazardous location
Hazardous locations require more than a "cookbook" approach to electrical work. This is because of the thought you must put into the simplest decisions.
Not all hazardous locations are the same. Even where the Division, Class, and Group may be the same- the actual chemical causing the danger will have different properties.
For example, Natural Gas rises; propane sinks. So, if natural gas is your concern, there is a "classified" area near the ceiling- while for propane, it is near the floor.
Ventilation is also an issue; this is why most areas within an auto service shop are not considered "classified" locations. That's why receptacles are placed above 18" .... and the lights over the gas pumps above 12 ft.