A4418RT

Overview

The Hoffman A4418RT is a steel wiring trough with NEMA Type 3R rating, designed for outdoor and indoor use. It measures 18 inches in length, 4 inches in width, and 4 inches in height. The unit features a slip-on removable cover and includes a drip shield on the top. Constructed from 16-gauge steel, it is finished with ANSI 61 gray polyester powder paint over a pretreated surface. This component supports wire and cable distribution, junctions, and terminations while providing protection against rain and sleet.

Feature Summary

• NEMA Type 3R rated construction protects internal wiring from rain and sleet ingress
• Slip-on removable cover allows for easy access to internal cable management areas
• Integrated drip shield on the top prevents water accumulation on the enclosure surface
• Seamless sides, front, and back design enhances environmental sealing integrity

Applications

• Outdoor wire and cable distribution systems
• Protection of electrical junctions and terminations in exposed environments
• Indoor routing of cables where moisture resistance is required
• Supporting cable management in industrial equipment enclosures

Procurement Notes

Verify that the specific application environment aligns with NEMA Type 3R requirements, which protect against rain and sleet but are not submersible. Confirm that the 16-gauge steel material and ANSI 61 gray finish meet site aesthetic and durability standards. Ensure mounting hardware is compatible with the trough's dimensions and weight. Check for any local code requirements regarding grounding or bonding of steel enclosures in outdoor installations.

Selection Notes

Select this model when a robust, weather-resistant pathway for cables is needed between panels or equipment. The 4x4 inch cross-section accommodates multiple conductors without excessive crowding. The 18-inch length provides modular flexibility for various layout configurations. Consider the slip-on cover mechanism for maintenance frequency; if frequent access is required, ensure the cover remains secure during operation. Compare with screw-cover variants if higher tamper resistance is necessary.

Part Context

This wiring trough is part of the nVent Hoffman line of electrical enclosure accessories. It complements junction boxes and panel enclosures by providing organized cable routing. The product is manufactured by Hoffman Enclosures, Inc., now operating under nVent. It is distinct from solid enclosures, serving specifically as a conduit-like structure for managing wire runs rather than housing active components directly.

Replacement Considerations

Public confirmed substitute part numbers: None identified in provided documentation.