NEMA Type Rating Testing/Electrical Enclosure Ratings as per NEMA 250, UL50e, & CSA C22.2 94

We are experts in NEMA ratings, including 3R, 4X, and CSA C22.2 No. 94.2, and have a deep understanding of the requirements for each rating. Our state-of-the-art equipment and rigorous testing processes ensure that your products meet or exceed industry standards.

Find Out More about NEMA Testing

Request a Quote

To provide you with an accurate quote, we need a little more information about your requirements. Please take a few moments to fill out the form below, and one of our experts will be in touch with you shortly.

This field is for validation purposes and should be left unchanged.

Contact Us Now


Our commitment to excellence is reflected in our professional and friendly approach to customer service. We understand the importance of timely and accurate results, and our team works closely with you to ensure that you receive the information you need when you need it.

What Is NEMA/What are NEMA Type Ratings?

The National Electrical Manufacturers Association (NEMA) provides standards for the design and construction of electrical enclosures. NEMA designations are a way of classifying the degree of protection provided by an enclosure against environmental hazards such as dust, water, and impact. The NEMA designation chart is a valuable tool for engineers, contractors, and facility managers to determine the appropriate enclosure rating for their electrical equipment.

What are some of the most common NEMA Type Ratings?

NEMA 1 enclosures are intended for indoor use only and provide a basic level of protection against contact with live parts. NEMA 3R rated enclosures are intended for outdoor use and provide protection against rain, sleet, and snow. NEMA 3 rated enclosures offer the same protection as NEMA 3R, but are also suitable for indoor use. NEMA 4 rated enclosures provide protection against water, wind-driven rain, sleet, snow, wind, and falling ice. NEMA 4X enclosures provide the same protection as NEMA 4, but with added corrosion resistance.

How is UL50e Different from NEMA?

The UL 50E standard defines the requirements for electrical enclosures that are intended for use in ordinary (non-hazardous) locations. UL 50E covers the safety, performance, and environmental requirements of enclosures and the electrical equipment housed within them.

What does the X designation mean in a NEMA Type Rating?

NEMA testing involves evaluating the performance of an enclosure under specific environmental conditions and verifying that it meets the specified NEMA rating. NEMA X testing is a more rigorous test procedure that includes a salt spray test to evaluate the corrosion resistance of the enclosure.

Contact us to Start Your Project

NEMA 250 Indoor Type Ratings

Indoor Type RatingsType 1Type 2Type 4Type 4XType 5Type 6Type 6PType 12Type 12KType 13
Access to hazardous partsXXXXXXXXXX
Ingress of solid foreign objects (falling dirt)XXXXXXXXXX
Ingress of water (dripping and splashing)XXXXXXXXX
Ingress of solid foreign objects (circulating dust)XXXXXXX
Ingress of solid foreign objects ( settling dust)XXXXXXXX
Ingress of water (hosedown)XXXX
Oil and coolant seepageXXX
Oil or coolant spraying and splashingX
Corrosive AgentsXX
Ingress of water (temporary submersion)XX
Ingress of water (prolonged submersion)X

NEMA 250 Outdoor Type Ratings

Indoor/Outdoor Type RatingsType 3Type 3XType 3R3RXType 3SType 3SXType 4Type 4XType 6Type 6P
Access to hazardous partsXXXXXXXXXX
Ingress of solid foreign objects (falling dirt)XXXXXXXXXX
Ingress of water (dripping and splashing)XXXXXXXXXX
Ingress of water (rain, snow, sleet)XXXXXXXXXX
SleetXX
Ingress of solid foreign objects (windblown dust)XXXXXXXX
Ingress of water (hosedown)XXXX
Corrosive AgentsXXXXX
Ingress of water (temporary submersion)XX
Ingress of water (prolonged submersion)X

Other Ingress Protection Test Standards Available

Ingress Protection

NEMA 250, Section 5; UL50
UL50E
CSA C22.2 No. 94.1, 94.2
EN50436-1
EIA/ECA-364-10E
EIA-364-50B, Fine Sand
RTCA/DO-160G Sec12.0

Water Test/Rain, Ingress Protection, Icing/Freezing Rain

MIL-STD-810, M521, Icing & Freezing Rain
IEC/EN 60068-2-18
IEC/EN 60068-2-68
IEC/EN 60950-22
MIL-STD-202, M106
MIL-STD-810, M506.1
MIL-STD-810, M510.5
MIL-STD-810, M512.5
MIL-STD-883, M1002
RTCA/DO-160 Sec10.0
RTCA/DO-160, Section 24.0;
MIL-STD-810, Section 521

Start Your Project

We’re here to answer your questions and help you get started right away.

Contact us to Start Your Project