Electrical equipment manufacturing has become an ever-expanding global market. There are various standards that exist worldwide to define the type and use of enclosures for electrical equipment. It is necessary to understand the distinction between NEMA and IP ratings to ensure proper installation of equipment based on environment and locations.
The NEMA (National Electrical Manufacturers Association) and IP (Ingress Protection) rating systems are used to describe the degree of protection provide against intrusion (body parts such as hands and fingers), dust/dirt, accidental contact, and ingress of water. The NEMA rating system also makes a distinction between hazardous and non-hazardous environments.