In-stock orders placed after 3pm on Friday, May 26th will ship Tuesday, May 30th. Polycase will be closed Monday, May 29th in observance of Memorial Day.
The NEMA rating system is used in North American markets to rate the protective performance of electrical enclosures. Using a numerical scale, the NEMA system rates an enclosure’s level of protection against the ingress of harmful environmental factors like windblown dust, splashing water, corrosion and more. (See our guide to NEMA ratings to learn more.)
What Is a NEMA 4 Enclosure?
NEMA 4 is one of the most common enclosure ratings on the NEMA scale. This rating specifies several important qualities for an enclosure, including:
The waterproof and dustproof features make NEMA 4 enclosures suitable for outdoor use, and you’ll find them in use in all kinds of industrial, commercial and scientific applications. Note that it’s important to differentiate NEMA 4 enclosures from NEMA 4X enclosures. They’re similar in almost every respect, but NEMA 4X enclosures offer additional corrosion resistance. See all of our NEMA 4X enclosures here.
Polycase’s Selection of NEMA 4 Enclosures
We offer a variety of NEMA 4 outdoor enclosure models suitable for protecting your most sensitive electrical components. Our NEMA 4 enclosures include must-have features like:
Browse all of our NEMA 4 enclosures here, using the tools on the sidebar to refine your search. For additional enclosure types like NEMA 12, NEMA 3R and more, see all of Polycase’s NEMA rated enclosure models.