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NEMA 4 Enclosures & Boxes

NEMA 4 enclosures offer indoor and outdoor solutions for watertight electrical applications. Boxes meeting NEMA 4 standards ensure protection for your equipment in adverse conditions including rain, sleet and snow, as well as, splashing or hose directed water. With a wide range of sizes, from small to large, we make it easy to find the perfect NEMA 4 enclosure solution. Available materials include plastic, aluminum, steel and stainless steel. NEMA 4 boxes come in a variety of styles including hinged, junction box, pole-mount and more.

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:

  • Use of a waterproof and dustproof gasket
  • Protection against weather conditions like rain, sleet and snow
  • Protection against hose-directed water
  • Protection against flying dust, fibers and access to hazardous parts

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:

  • Constructed from durable materials like polycarbonate, stainless steel and aluminum
  • Numerous configuration options including wall mount flanges, clear covers, built-in knockouts and hinged covers with latches
  • Powerful and easy customization through Polycase’s in-house digital printing and CNC machining services
  • UL Listed to verify compliance with NEMA standards

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.

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  1. AN-11F
    As low as $13.63 per unit
    1.97 x 1.77 x 1.12 in.
    50 x 45 x 28 mm.
    Material: Aluminum
  2. AN-11P
    As low as $5.91 per unit
    1.97 x 1.77 x 1.12 in.
    50 x 45 x 28 mm.
    Material: Aluminum
  3. AN-18F
    As low as $13.72 per unit
    2.19 x 1.61 x 1.22 in.
    56 x 41 x 31 mm.
    Material: Aluminum
  4. AN-18P
    As low as $6.17 per unit
    2.19 x 1.61 x 1.22 in.
    56 x 41 x 31 mm.
    Material: Aluminum
  5. WA-20
    As low as $4.66 per unit
    2.28 x 2.52 x 1.38 in.
    58 x 64 x 35 mm.
    Material: ABS
  6. WA-20F
    As low as $4.66 per unit
    2.28 x 2.52 x 1.38 in.
    58 x 64 x 35 mm.
    Material: ABS
  7. WC-20
    As low as $5.74 per unit
    2.28 x 2.52 x 1.38 in.
    58 x 64 x 35 mm.
    Material: Polycarbonate
  8. WC-20F
    As low as $5.48 per unit
    2.28 x 2.52 x 1.38 in.
    58 x 64 x 35 mm.
    Material: Polycarbonate
  9. WP-20
    As low as $5.59 per unit
    2.28 x 2.52 x 1.38 in.
    58 x 64 x 35 mm.
    Material: Polycarbonate
  10. WP-20F
    As low as $5.21 per unit
    2.28 x 2.52 x 1.38 in.
    58 x 64 x 35 mm.
    Material: Polycarbonate
  11. AN-01F
    As low as $6.25 per unit
    2.52 x 2.28 x 1.38 in.
    64 x 58 x 35 mm.
    Material: Aluminum
  12. Timer Module

    Polycase Customization Services

    Minimal cost. Maximum impact.

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  13. AN-01P
    As low as $5.91 per unit
    2.52 x 2.28 x 1.38 in.
    64 x 58 x 35 mm.
    Material: Aluminum
  14. HD-22F
    As low as $3.88 per unit
    2.63 x 2.63 x 1.63 in.
    67 x 67 x 41 mm.
    Material: Polycarbonate
  15. ML-22F
    As low as $5.80 per unit
    2.63 x 2.63 x 1.63 in.
    67 x 67 x 41 mm.
    Material: Polycarbonate
  16. AN-19F
    As low as $18.49 per unit
    3.13 x 2.93 x 2.05 in.
    80 x 74 x 52 mm.
    Material: Aluminum
  17. AN-19P
    As low as $10.49 per unit
    3.13 x 2.93 x 2.05 in.
    80 x 74 x 52 mm.
    Material: Aluminum
  18. WA-31
    As low as $6.32 per unit
    3.23 x 3.15 x 2.17 in.
    82 x 80 x 55 mm.
    Material: ABS
  19. WA-31F
    As low as $6.92 per unit
    3.23 x 3.15 x 2.17 in.
    82 x 80 x 55 mm.
    Material: ABS
  20. WC-31
    As low as $8.92 per unit
    3.23 x 3.15 x 2.17 in.
    82 x 80 x 55 mm.
    Material: Polycarbonate
  21. WC-31F
    As low as $9.36 per unit
    3.23 x 3.15 x 2.17 in.
    82 x 80 x 55 mm.
    Material: Polycarbonate
  22. WP-31
    As low as $8.92 per unit
    3.23 x 3.15 x 2.17 in.
    82 x 80 x 55 mm.
    Material: Polycarbonate
  23. WP-31F
    As low as $9.36 per unit
    3.23 x 3.15 x 2.17 in.
    82 x 80 x 55 mm.
    Material: Polycarbonate
  24. Timer Module

    Polycase Customization Services

    Minimal cost. Maximum impact.

    Learn More

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Customization Services

CNC Machining

From simple cutouts to threaded or counterbored holes, we can machine virtually any size or shape opening.
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Digital Printing

Skip the label with our vibrant, full-color graphics printed right onto your enclosure.
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waterproof electrical enclosure

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