Thomas Betts NJ644 Polycarbonate Enclosure Nema 4X

Product Description

The THOMAS BETTS NJ644 is a standard polycarbonate electrical enclosure rated for NEMA 1, 2, 3, 3S, 3SX, 3X, 4, and 4X environments. It measures 6 inches wide, 4 inches high, and 4.4 inches deep, making it a compact option for protecting electrical components in demanding conditions. The enclosure features a hinged flat cover with captive cover screws and swing panels for secure, repeatable access. Its polycarbonate construction resists corrosion and provides excellent impact resistance, suited for both indoor and outdoor installations. Electricians and controls technicians install this enclosure to house terminal blocks, relays, PLCs, or other low-voltage components requiring environmental protection.

This enclosure is appropriate for residential and light commercial electrical applications where protection from dust, moisture, and weathering is required. The NEMA 4X rating makes it suitable for outdoor installations or wash-down environments where water ingress is a concern. It is commonly used in panel builds, junction box applications, and control system enclosures where a compact, transparent or opaque polycarbonate housing is preferred. Its multi-rating covers a wide range of indoor and outdoor use cases without requiring a specialized housing.

Key Features

• Polycarbonate construction provides corrosion resistance and durability in wet or outdoor locations
• NEMA ratings 1, 2, 3, 3S, 3SX, 3X, 4, and 4X cover a broad range of environmental conditions
• Hinged flat cover with captive cover screws and swing panels for easy, tool-assisted access
• Compact footprint at 6 x 4 x 4.4 inches fits tight installation spaces
• cULus Listed (E88685) confirms compliance with applicable safety standards

Compatibility

Designed as an OEM-style standard electrical enclosure suitable for general-purpose and weatherproof control, junction, and terminal wiring applications across residential and commercial installations.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes. Disconnect and de-energize all circuits before opening or modifying the enclosure. Ensure all conduit entries and knockouts are properly sealed to maintain the stated NEMA rating after installation. Mounting hardware should be appropriate for the substrate and load being supported by the enclosure.