HN3

Overview

The Hoffman HN3 is a NEMA 1 indoor enclosure constructed from cold-rolled steel, designed for general-purpose electrical component housing. It features a standard gray polyester powder paint finish and includes a hinged door with a key-operated lock for secure access. The unit provides basic protection against dust and falling objects in controlled indoor environments. Standard configurations typically include mounting provisions for internal components and cable entry points suitable for conduit connections. This model serves as a fundamental solution for organizing and protecting low-voltage and power distribution equipment within industrial control panels or dedicated enclosures.

Feature Summary

• Hinged door design facilitates easy access to internal components without complete removal of the enclosure cover.
• Key-operated locking mechanism ensures security for installed electrical devices and wiring.
• Cold-rolled steel construction offers structural rigidity and durability for indoor industrial applications.

Applications

• Indoor electrical panel assembly
• Control system component housing
• Low-voltage circuit protection

Procurement Notes

Verify specific dimensional requirements and knock-out configurations prior to ordering, as these vary by sub-model. Confirm that the intended application remains within indoor environments, as this NEMA 1 rated unit lacks weatherproofing seals. Ensure compatibility with existing conduit entries and mounting hardware specifications for seamless integration into larger control systems.

Selection Notes

Select this model when a basic, cost-effective indoor enclosure is required without the need for high ingress protection ratings. Consider alternative NEMA 4X models if exposure to moisture, dust, or washdown procedures is anticipated. Evaluate internal space requirements carefully to ensure adequate room for terminal blocks, relays, and wiring bends.

Part Context

Hoffman Enclosures, now part of Eaton, manufactures the HN3 series as part of their standard line of industrial metal enclosures. These units are widely recognized in the North American market for compliance with NEMA standards. The product line supports various sizes and customization options to meet diverse OEM and end-user specifications for electrical infrastructure.

Replacement Considerations

Direct replacements may include equivalent NEMA 1 steel enclosures from manufacturers such as Rittal or Hubbell. Verify that substitute models match the external dimensions, mounting hole patterns, and door hinge orientation to ensure fitment in existing installations.