NEMA Enclosures

Quality-Forward, Custom Enclosures with High Repeatability

EM Dynamics manufactures customizable environmentally rated enclosures for clients in a variety of industries.

NEMA ratings serve as performance benchmarks established by the National Electrical Manufacturers Association (NEMA). They have been so widely adopted by users of electrical enclosures that terms like NEMA 3R and NEMA 4X have almost become synonymous with the product itself.

Although these terms have become standard parlance, it’s crucial to note that not all NEMA enclosures are identical. Within each performance category, EM Dynamics’ NEMA enclosure products stand out for their superior durability and consistent manufacturing excellence. These qualities are a result of our commitment to employing cutting-edge manufacturing equipment and leveraging decades of expertise in building enclosures.


NEMA Description
NEMA 1 General purpose enclosures that are typically manufactured to protect live parts.
NEMA 2 Offer the same level of protection as NEMA 1, but NEMA 2 enclosures are drip-tight.
NEMA 3 Weather-resistant enclosures that include a degree of protection from windblown dust and ingress of water.
NEMA 3R Designed very similar to NEMA 3 enclosures, however, 3R enclosures can be ventilated.
NEMA 4 Often called rain tight enclosures due to their excellent weather resistance.
NEMA 4x Generally manufactured using 304 & 316 stainless steel due to its protection from corrosive materials.
NEMA 12 Dust tight enclosures that are constructed without punch outs.
NEMA 13 Built for indoor industrial applications that require protection from dust, lint, splashing oil and non-corrosive liquids.
Custom NEMA Enclosure¬† We can fabricate a custom NEMA enclosure to any size range, from a small 12″ x 12″ x 12″ electrical enclosure to a Walk-in Enclosure.



At EM Dynamics, we firmly believe that the fabrication process should align seamlessly with the specific application requirements, ensuring that your industrial needs are met while adhering to the appropriate enclosure rating. Our capabilities extend to the design and manufacturing of NEMA enclosures that hold UL certification in both the United States and Canada.

Prior to commencing the fabrication of an electrical enclosure, we prioritize open communication with our clients. This dialogue helps us gain a comprehensive understanding of the intended application and any environmental challenges it may encounter. Armed with this knowledge, we can then recommend the most suitable NEMA Rating for the enclosure.

Our expertise enables us to assist you in crafting an enclosure that can withstand a diverse array of environments, ranging from demanding industrial settings to harsh, corrosive weather conditions. Our NEMA 4 enclosures, for instance, are meticulously constructed to shield your electrical components from a wide spectrum of potential hazards, including splashing water, indoor washdowns, as well as outdoor elements like rain, sleet, snow, and airborne dust, among others. With over five decades of experience in designing and fabricating NEMA enclosures to the most exacting standards, we stand ready to meet your requirements with precision and reliability.