Electrical Enclosures & Junction Boxes
RSP Supply carries a full catalog of NEMA-rated electrical enclosures and junction boxes from leading manufacturers such as Hoffman, Rittal, Stahlin, Allied Moulded, and Phoenix Contact. Our extensive selection includes enclosures in various sizes, materials, and protection ratings; ensuring safe, reliable performance across all industrial and commercial applications.
Electrical enclosures and junction boxes protect vital electrical and electronic components from environmental hazards like dust, water, and corrosion. They are essential in industries such as oil and gas, water treatment, manufacturing, and automation, where reliability and safety are critical. Whether installed in a clean control room or exposed to rugged outdoor conditions, the right enclosure ensures system longevity and compliance with electrical standards.
Why Junction Boxes Matter
Junction boxes are small but critical components in any electrical system. They safely contain and protect wire connections, preventing electrical hazards while simplifying access for maintenance and troubleshooting. A well-constructed junction box keeps wiring organized and shielded from environmental stress, ensuring smooth operation and safe repairs.
Don’t Forget the Accessories
Maximize the performance of your enclosure with compatible accessories from RSP Supply. We carry vent kits, mounting panels, DIN rails, cable management components, and thermal control products to improve installation, airflow, and equipment life. The right accessories help your enclosure perform exactly as required - offering better protection against temperature, vibration, and moisture while simplifying system management.
nVent Hoffman Enclosures
Rittal Enclosures
Stahlin Enclosures
Allied Moulded Enclosures
Phoenix Contact Enclosures
Schneider Electric Enclosures
Killark Enclosures
Adalet Enclosures
PCTEL Enclosures
FAQs
Q: What materials are electrical enclosures made from?
Electrical enclosures are available in steel, stainless steel, aluminum, fiberglass, and polycarbonate materials; each offering different levels of protection against corrosion, impact, and weather.
Q: What is a NEMA rating, and why is it important?
A NEMA rating defines the level of protection an enclosure provides against environmental factors like dust, moisture, and corrosion. Choosing the correct NEMA rating ensures equipment safety and compliance with industrial standards.
Q: Can these enclosures be used outdoors?
Yes. Many enclosures available at RSP Supply are rated for outdoor use, featuring weatherproof and corrosion-resistant designs ideal for harsh environments.
Q: Do junction boxes protect against electrical shock?
Yes. Junction boxes safely contain wire connections and prevent accidental contact, helping reduce the risk of electrical shock and system failure.
Q: What accessories improve enclosure performance?
Vent kits, gaskets, DIN rails, mounting plates, and thermal management components enhance protection, organization, and airflow; extending the lifespan of enclosed equipment.
Why Buy Electrical Enclosures from RSP Supply
RSP Supply is your trusted source for electrical enclosures and junction boxes built to last. We offer top brands, competitive pricing, and expert support to help you find the best protection for your electrical systems. With same-day shipping on in-stock items and a complete selection of accessories, RSP Supply ensures every project runs safely, efficiently, and on schedule.
Enclosure Selection Basics
Electrical enclosures are cabinets that are designed to house electrical components and electrical controls. Their main function is to protect the components, as well as to protect the operators from electrical hazards and ensure electrical safety. Enclosures are typically made of solid plastics, fiberglass, and metal materials, such as carbon steel, stainless steel, and aluminum, to provide robust protection for electronic controls and electronic equipment.
One of the most important things to consider when selecting an electrical enclosure is the NEMA rating. NEMA stands for National Electrical Manufacturer Association. They have developed a rating system which determines the types of environments an electrical enclosure can be used in.
NEMA 1 and a NEMA 12 enclosures
Both of these enclosures are intended for indoor use only. They are both dust resistant. The NEMA 12 enclosure is rated for damp environments. The NEMA 1 is rated only for dry environments.
NEMA 4 and NEMA 4X enclosures
Both of these enclosures can be used indoors as well as outdoors. They are both dust resistant. They are also water resistant and corrosion resistant. NEMA 4X has an extra layer of corrosion resistance.
NEMA 7 enclosures
This is a more specific type of enclosure that is rated for use in hazardous environments. It is rated to contain an explosion within the enclosure and not cause any sort of external hazard.
Size
When selecting the size of an enclosure, it is important to consider the following: how much space will the electrical components occupy, how much space is needed around each component, is there enough room to run all of the wires and how much space is needed outside of the enclosure?
Temperature
When selecting an enclosure, it is important to consider both the ambient temperature and the temperature that is generated inside of the enclosure. When an enclosure is located outside in direct sunlight, that heat can be transferred inside the enclosure. Also, each component inside of the enclosure generates a certain amount of heat.