The National Electrical Manufacturers Association, NEMA is the governing body that regulates enclosure design.
- ACT’s products are UL 50E tested & designed to meet the NEMA ratings of the application’s enclosure.
| NEMA Rating | IP Rating | Description |
| 12 | 52 | Indoor, dust tight, drip tight |
| 4 | 65-66 | Indoor/outdoor, hose directed watertight |
| 3R | 11-14 | Indoor/outdoor, rain protection |
| 4X | 65-66 | Indoor/outdoor, hose directed watertight with corrosion resistant materials |
The International Electrotechnical Commission, under IEC standard 60529 has issued the IP Code, International Protection Marking, sometimes interpreted as Ingress Protection Marking, classifies and rates the degree of protection provided against intrusion (body parts such as hands and fingers), dust, accidental contact, and water by mechanical casings and electrical enclosures.