Environments facing harsh weather conditions benefit from using a NEMA 4 junction box that offers superior protection for electrical components. Learn more about the NEMA 4 specification and when to install a NEMA 4 enclosure for protection against windblown dust and splashing water.
What Makes an Enclosure NEMA 4 Rated?
The National Electrical Manufacturers Association (NEMA) has developed a rating system to indicate the specific standards that electrical enclosures must meet.
Each rating applies to specific features and suitable operating conditions. NEMA 4 J boxes are suitable for both indoor and outdoor applications, protecting components from water ingress, whether from a hose or rain. These enclosures are capable of withstanding up to 65 gallons of water per minute shot from a 1″ nozzle 10 feet away for at least 5 minutes.
This added protection against exposure to water makes NEMA 4 junction boxes ideal for more heavy-duty industrial applications, such as protecting outdoor telecom gadgets, power systems, and food processing equipment.
Hope’s Weatherproof Box Models
At Hope Electrical Products Co., Inc., we offer two types of NEMA 4-rated junction boxes, including:
- NEMA 4 junction box. These enclosures are watertight, preventing water ingress at up to 65 gallons per minute. This means they protect against rain, sleet, snow, and hose-directed water.
- NEMA 4X junction box. These boxes offer the same benefits as NEMA 4 junction boxes, with enhanced corrosion resistance for corrosive environments such as marine, solar, and waste facilities.
Our NEMA 4 junction box models are available in H1200, H2200 and H3200 weatherproof box types. The H1200 is an unflanged junction and pull box designed for surface mounting, offering reliable weather and dust protection. Our H2200 boxes have a surface-mounted pull and junction style, while our H3200 hinged weatherproof boxes offer additional protection for bus bar panels, relays, transformers, and more.
Material Options and Mounting Styles
If you need a reliable NEMA 4 junction box for your application, the experts at Hope Electrical can provide you with the most appropriate solution based on your unique requirements. We offer enclosures in various materials, including cast iron, stainless steel, and powder-coated steel for a long-lasting and corrosion-resistant solution.
Additionally, we can customize your enclosure’s mounting configuration, whether you need standard surface mounting, flush concrete mounting, or another option.
Ideal Environments for NEMA 4 Protection
NEMA 4 junction boxes work for various types of equipment across multiple environments.
Protecting Sensitive Equipment
Many indoor and outdoor spaces rely on NEMA 4 enclosures to house electronic and electrical equipment, from automation electronics to IT and security equipment.
Preventing Water Ingress in Splashdown Environments
One of the main purposes of NEMA 4 junction boxes is to prevent water from compromising electrical or electronic components and presenting a safety risk. In many cases, environments using these junction boxes are subject to frequent washdown and splashing, including food processing facilities that need regular washdowns to prevent contamination of food and beverage products.
Other environments that often experience water splashing include:
- Dairy processing plants
- Vehicle cleaning facilities
- Pulp preparation areas in paper mills
Weatherproofing in Harsh Outdoor Environments
If inclement weather conditions and other types of gradual outdoor wear are likely, NEMA 4-rated junction boxes could also help. For instance, certain locations might experience regular exposure to harsh winds, high temperatures and humidity levels, freezing temperatures that lead to snow and ice buildup, or frequent rainfall. NEMA 4 junction boxes installed in these locations effectively protect sensitive electronics with minimal maintenance.
Available Customization Options
When you turn to Hope Electrical for NEMA 4-rated junction boxes, our experts can match you to the right custom solution based on your specifications.
In addition to various material options and mounting styles, we offer H1200, H2200 and H3200 boxes in custom sizes and with internal accessories. We can also make modifications according to airtight or dust-tight requirements to meet strict industry standards.
High-Quality NEMA 4 Boxes From Hope Electrical Products Co., Inc.
If you require a weatherproof NEMA 4 junction box or another NEMA-rated product for your electrical systems, Hope Electrical is your trusted NEMA 4 box supplier. Browse our products for basic spec information, and we can customize them further to meet your requirements. To get started on a solution for your application, request a quote from us today.