Electrical enclosures are cabinets or boxes used to contain and organize electrical and electronic equipment, such as circuit breakers, control panels, and telephone systems. Typically made from rigid and durable materialssuch as aluminum, stainless steel, or steel. 

Key Design Considerations for Electrical Enclosures 

When manufacturing custom electrical enclosures, there are several factors to keep in mind to ensure the finished products accommodate the requirements and restrictions of their intended use cases. Some of the key considerations are

  • Environment. The intended operating environment for an electrical enclosure determines the performance characteristics required. For example, outdoor electrical enclosures must demonstrate durability and resistance to damage from weathering. NEMA rating
  • NEMA ratings allow users to easily determine whether an enclosure is suited to their application. For use in nonhazardous indoor locations, enclosures with NEMA ratings of 1, 2, 4, 4X, 5, 6, 6P, 12, 12K, and 13 are appropriate. For non-hazardous outdoor locations, enclosures with NEMA ratings of 3, 3X, 3R, 3RX, 3S, 3SX, 4, 4X, 6, and 6P are a suitable option. For use in hazardous locations, the NEMA ratings requiredincluding Class A to G and 10vary based on the compounds present
  • Durability. The conditions an enclosure may be exposed to influence how durable they should be. For example, if impact or tampering is expected, the material chosen should demonstrate the proper strength and sturdiness to minimize damage to the equipment
  • Optional modifications. For OEMs or endusers with highly specific needs, it may be appropriate to make modifications to a standard enclosure to suit the exact specifications demanded. Alternatively, they can turn to custommade solutions
  • Thermal management requirements. High heat can damage sensitive electrical and electronic components. Integrating a cooling component can prevent thermal damage from occurring 
  • Size. The size of the enclosure needed depends on the application and determines the ideal construction material. In regard to the latter, materials such as polycarbonate are generally used for small enclosures, while materials like steel and stainless steel are utilized in large enclosures
  • Aesthetics. Some enclosures remain out of sight, while others are quite visible. For the latter, industry professionals may add elements that improve the aesthetic design of the piece, such as paint and other finishing touches
  • Weight. Enclosures intended for wall mounting require lightweight construction materials. For these applications, materials such as polycarbonate and fiberglass have a much lower weight than a comparable amount of aluminum or steel
  • Budget. While many enclosure options may suit an application, it is important to choose the one that fits within the budget. In regard to material, price varies based on the enclosure size, with some options being affordable in small enclosures but too expensive in large enclosures
  • Material. Enclosures are available in many different materials, such as aluminum, copper, iron, and steel. As indicated above, the right material depends on many factors, including operating environment, size, weight, and budget

Fabricated Electrical Enclosure Products From Selco 

At Selco, we provide a wide range of custom enclosures, cabinets, and housings for use in electrical applications. We accommodate requests for all NEMA ratings, including, but not limited to, NEMA 4X and NEMA 6P. We also fabricate FIRE RATED BOXES. Some of our other enclosure capabilities include

  • Custom cable trays made from aluminum, stainless steel, or painted CORTEN steel 
  • Cabinets and enclosures for use in tunnels, bridges, substations, water, and wastewater treatment facilities and control and utility rooms.
  • Complete snow melters with fully integrated controls 

General electrical components such as control panels and switch boxes.

Selco Manufacturing: Your Source for Custom Electrical Enclosures 

Founded in 1907, Selco Manufacturing Corp. began operations as a builder of the 3rd Rail Transit Products for the original NYC subway system. Since then, we have expanded our manufacturing capabilities to also cater to the needs of the construction, electrical, highway, industrial, and utility industries

By partnering with us for their custom electrical enclosure needs, our customers benefit from our

  • Fully equipped 50,000square foot facility located in West Caldwell
  • Broad manufacturing capabilities, including for complex structural and other steel fabrication and inhouse finishing requirements
  • Relationships with top industry professionals
  • Competitive prices
  • Quick turnaround times 

For additional information about our custom electrical enclosure solutions, request a quote today.

NEMA Fabricated Enclosures

NEMA 6P Enclosures

U.L. Listed Submersible Enclosures and Cabinets. Intended for indoor and outdoor applications where more protection is needed due to water submersion.

NEMA 4X Enclosures

U.L. Listed Enclosures for indoor and outdoor use. Providing protection with respect to harmful effects on equipment inside the enclosure due to the ingress of rain, sleet, snow, splashing water and hose directed water. There is also additional protection against corrosion.

Transformer Case

Owner: Long Island Railroad (LIRR)
Transformer Case and 2200 Volt Signal Feeder Switch. The Transformer case is 116″ Long X 30″ Deep X 76″ in Height. It is fabricated from 1/8″ thick 6061 Aluminum with Stainless Steel Hinges and Hardware.

Montague Tunnel Cable Tray

Amtrak Cable Tray Penn Station Newark, NJ

New York City Transit Cable Tray

Metro-North Snowmelter Cabinet Wired