In hazardous locations, at what height above the floor should appliances with an ignition source be elevated?

In hazardous locations, the elevation of appliances with an ignition source is crucial for minimizing the risk of ignition due to flammable vapors or gases that may accumulate near the floor. The standard practice is to elevate these appliances to a height of at least 1.5 feet above the floor. This height is designed to ensure that any potentially explosive vapors, which are typically heavier than air and will settle near the ground, do not come into contact with the ignition source.

By elevating appliances to this recommended height, the risk of an ignition event is significantly reduced because it helps to avoid the potential for flammable substances to reach the ignition point. Additionally, this practice aligns with safety codes and regulations that are established for specific hazardous environments, further enforcing the importance of proper installation and positioning of equipment.