NEMA 4X Enclosures

NEMA 4X boxes give strong dust and water protection plus corrosion resistance

NEMA 4X enclosures provide the same level of indoor-outdoor protection as a NEMA 4 enclosure but with the addition of corrosion protection. Bud’s enclosures that meet this requirement are made from ABS plastic, polycarbonate plastic, fiberglass, and die cast-aluminum, which are inherently corrosion resistant.

This is why many NEMA 4 enclosures are also rated NEMA 4X. A NEMA 4X box is gasketed and tightly sealed against air-blown dust and contaminants. It also blocks the intrusion of hose directed water, making it an excellent choice for factory washdown and outdoor applications. See NEMA 4 selection tips.

Some common uses include housing electronics located outdoors—such as solar and lighting controls, agricultural equipment, wi-fi points, and oilfield equipment. Rain, ice, and wind should not penetrate a NEMA 4X enclosure. Indoor applications include housing controls inside manufacturing and processing plants where machinery is washed down with a hose, such as in food processing and powder handling. NEMA 4X test requirements including spraying the enclosure with salty water.

It should be noted that NEMA rated boxes are routinely modified with holes for power and signal cables, openings for displays and indicators, and space for switches, buttons, and dials. Special care must be taken to seal openings with cable glands and gaskets in order to maintain the protection of a NEMA 4X rating. Bud has a wide selection of cable glands for NEMA rated enclosures.

Nearly all of our NEMA 4 X enclosures are covered by our industry-leading 5-Day Modifications program. Get custom cutouts in only 5 to 6 days. Most of our NEMA 4X boxes are available for same-day shipping. Combined with fast modifications, you get quickly get the enclosure you need.

As many manufacturers don’t know where their products will be used, often a NEMA 4X enclosure is a good default. It provides a high degree of protection without the extra cost of a fully submersible enclosure. As a result, NEMA 4X enclosures are easily available.

Bud has one of the largest selections of NEMA 4X enclosures in the industry. Browse our selection and use the filters to find exactly the right enclosure for you need.

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