NEMA 4 Enclosure

NEMA 4 enclosures differ because of their watertight protection against splashing water and indoor washdowns from commercial hoses. They also offer ingress protection from windblown dust, dirt, debris, rain, sleet, snow, and ice.

Whereas NEMA 3 enclosures offer general-purpose weather protection in outdoor spaces, NEMA 4 electrical enclosures offer maximum protection against moisture and dust in outdoor environments. NEMA 4 water-tight enclosures have an outstanding IP66 rating, making them ideal for harsh climates, coastal environments, and other demanding locations.

NEMA 4 enclosures are often referred to as rain-tight enclosures due to their excellent weather resistance, making them suitable for the most sensitive electrical equipment.

Exterior applications for NEMA 4 enclosures include power utilities, alternative energy (e.g., hydroelectric, solar, and wind generators), telecom towers in cold climates, and noncorrosive oil and gas processing areas.

The enhanced moisture protection of NEMA 4-rated products is also a good investment for indoor manufacturing operations that depend on frequent washdowns or high-pressure spray, such as:

• Pharmaceutical
• Food processing
• Food and beverage manufacturing
• Painting/finishing operations for OEM parts
• Petrochemical manufacturing (noncorrosive areas)

Sawmills and furniture manufacturing/woodworking operations can benefit from the high level of dust resistance and excellent weather resistance of NEMA 4 water-tight enclosures.

Moisture protection for electrical and electronic components is essential for a safe working environment. Protecting employees from electrical shocks and potential fire hazards is important for regulatory compliance in many industries.

Water, oil, chemicals, dirt, and dust are also bad for electrical components and electronics, from transformers and actuators to PLCs and circuit boards. Short circuits can cause permanent damage to equipment, while accumulated dirt can lead to interrupted signals, premature wear, and malfunctions. A water-resistant enclosure can help you keep operations running smoothly and avoid costly stoppages or equipment breakdowns.

At Bison Profab, we can manufacture NEMA 4 electrical enclosures in a wide range of sizes. Options include small wall mounts, pole- and tower-mounted enclosures, two-door floor-mount models, and free-standing enclosures for concrete slab installations. We also have the capability to create walk-in NEMA 4 enclosure buildings for large equipment setups.

We manufacture NEMA 4 enclosures from a variety of metals depending on your specific application. These include specific types of stainless steel grades to enhance corrosion resistance.

Aluminum enclosures have less tensile strength, but they offer natural heat dissipation, which can be important for sealed enclosures in hot environments. Aluminum is also resistant to saltwater corrosion, making it an excellent alternative for SS in coastal operations.

If your enclosure is to be used in a corrosive environment, you need to upgrade to a NEMA 4X enclosure. We can help you choose between aluminum or 316 stainless steel for your application environment and specifications.

NEMA 4 enclosures are generally gasketed with doors that clamp to provide a maximum seal. They can also be equipped with continuous hinges, mounting feet, and padlock hasps.

Discover fully customizable rain-tight electrical enclosures with the right mounting options for your location. Our enclosures not only do the job; they make the job easier.

Not sure which steel, stainless steel or aluminum NEMA 4 enclosure to choose? Request a quote for more information.