Thomas Betts NS644 Polycarbonate Enclosure Nema 4X

Product Description

The THOMAS BETTS NS644 is a standard polycarbonate electrical enclosure designed to house and protect electrical components in commercial and industrial installations. Measuring 4 inches wide by 6 inches high by 4 inches deep, it provides a compact, impact-resistant housing suitable for control wiring, terminal blocks, and small electrical assemblies. The flat screw cover secures with captive screws, reducing the risk of lost hardware during service. Multi-rating across NEMA 1, 2, 3, 3S, 3SX, 3X, 4, and 4X means a single enclosure meets a wide range of environmental exposure requirements. Licensed electricians and instrumentation technicians are the primary installers.

The NS644 is suited for both indoor and outdoor applications where moisture, dust, or corrosive wash-down conditions may be present. The NEMA 4X polycarbonate construction resists corrosion without the weight penalty of stainless steel, making it a practical choice for light industrial panels, outdoor disconnect housings, and junction boxes in wet locations. The included hinges and swing panels support organized internal layout and straightforward field wiring access.

Key Features

• Polycarbonate construction provides impact resistance and corrosion resistance without additional coating
• NEMA 4X rating supports use in wet, wash-down, and mildly corrosive outdoor environments
• Multi-NEMA rating: 1, 2, 3, 3S, 3SX, 3X, 4, and 4X covers a broad range of installation contexts
• Captive cover screws prevent hardware loss during repeated service access
• Includes hinges and swing panels for organized internal component layout
• cULus Listed (E88685) and UL Listed 50 for code-compliance in NEC-governed installations

Compatibility

Designed as an OEM-style standard electrical enclosure suitable for residential, commercial, and light industrial electrical installations requiring NEMA 4X or lower environmental protection ratings.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements. De-energize all circuits before opening or mounting the enclosure. Verify that conduit entry knockout locations and enclosure mounting points are compatible with the planned installation before cutting or drilling. Maintain the enclosure seal integrity when making conduit entries to preserve the NEMA rating.