Industrial Enclosure Selection: Getting Familiar with Standards and Ratings

If you are preparing to extend your network into nontraditional environments, we recommend getting a basic understanding of the standards that define degrees of environmental protection.

This will greatly help to simplify selection and ensure the enclosure style and size is suitable for your application. 

What Are IP Codes and Why Do They Matter for Your Network?

The international standard for ingress protection (IP) ratings is International Electrotechnical Commission (IEC) standard 60529, Degrees of Protection Provided by Enclosures (IP Code).

The IP code is stated as two numbers, ex. IP55. The first number identifies the degree of protection against hazardous parts and against solid foreign objects (dust penetration).

The second number identifies the degree of protection against ingress of water (liquid penetration). A higher number indicates better protection. IP codes do not address corrosion protection.

See Table 1 below for the definitions of IP codes:

NEMA vs. UL Enclosures: Key Differences You Need to Know

In the United States, the National Electrical Manufacturers Association (NEMA) publishes NEMA Standard 250 Enclosures for Electrical Equipment (1,000 V Maximum), which identifies 16 types of enclosures for nonhazardous locations, each providing a different level of protection against dust and liquid penetration.

Underwriters Laboratory (UL) has a similar system in UL 50 Enclosures for Electrical Equipment, Non-Environmental Considerations; UL 50E Enclosures for Electrical Equipment, Environmental Considerations; and UL 508A Standard for Industrial Control Panels.

The difference between NEMA Type and UL Type is that manufacturers can self-certify NEMA Type enclosures, but UL Type enclosures are verified by UL through a series of design review and performance testing.

See Table 2 and Table 3 below for the NEMA types of enclosures used in indoor and outdoor nonhazardous locations:

Find the Right Enclosure for Your Needs

Chatsworth Products’ RMR® Industrial Enclosures offer a range of solutions designed to protect your equipment in the most challenging conditions. Engineered to meet the highest standards, these enclosures provide superior protection from dust, water, and corrosion, ensuring long-lasting performance.

Download the RMR® Industrial Enclosures Brochure and explore the full range of options to ensure your equipment stays protected in any environment.