Thomas Betts GUAX37-TB Round Iron Electrical Box Hazardous Location

Product Description

The THOMAS BETTS GUAX37-TB is a round, iron electrical box designed for use in hazardous location wiring systems. Built with a zinc-plated iron body, it measures 3.5 inches in overall width and 2.31 inches in overall depth. The box includes four 1-inch knockouts and comes with internal ground screws. It meets UL 514A, UL 886, and CSA C22.2 No. 30 certifications, making it suitable for classified environments where ignition risk and environmental exposure are primary concerns. Licensed electricians working in industrial, commercial, or heavy-duty facilities typically specify this box for conduit wiring in rated hazardous zones.

This box is rated for Class I Divisions 1 and 2 Groups C and D, Class II Division 1 Groups E, F, and G, and Class III Divisions 1 and 2. It carries NEMA 7 CD, NEMA 9 EFG, NEMA 3, and NEMA 4 ratings, covering a wide range of hazardous and wet-location installation scenarios. Typical applications include industrial facilities handling flammable vapors, combustible dusts, or ignitable fibers, as well as outdoor installations requiring weathertight enclosures. The non-weather-resistant designation applies to the box interior only; NEMA 3 and NEMA 4 ratings address external environmental exposure.

Key Features

• Round iron body with zinc-plated finish for corrosion resistance
• Four 1-inch knockouts for flexible conduit entry configuration
• Internal ground screws included
• Rated NEMA 3, NEMA 4, NEMA 7 CD, and NEMA 9 EFG
• Listed to UL 514A and UL 886 under UL File 202368
• CSA Certified to CSA C22.2 No. 30

Compatibility

Designed as an OEM-style hazardous location electrical box compatible with standard 1-inch trade size conduit fittings in Class I, II, and III classified installations.

Installation Notes

Installation must be performed by a licensed electrician in accordance with the National Electrical Code (NEC) and applicable local codes governing hazardous locations. De-energize all circuits before opening or wiring the box. Verify the area classification and NEMA rating requirements match the installed environment before proceeding. Do not use in applications outside the listed hazardous location classifications without consulting the manufacturer documentation.