Thomas & Betts H250GR-TB Grounding Conduit Hub

Description:

The Thomas & Betts H250GR-TB Grounding Conduit Hub is used to provide a watertight, electrically bonded connection between 2-1/2-inch threaded rigid metal conduit or IMC and threadless electrical enclosures in commercial and industrial electrical systems. Commonly installed in switchboards, motor control centers, panelboards, control panels, outdoor enclosures, and hazardous location equipment where secure conduit termination, grounding, and environmental sealing are required. Maintenance electricians, OEM manufacturers, and system integrators use this grounding conduit hub for new installations, preventive maintenance, retrofit projects, and replacement of existing conduit hubs.

Applications:

The Thomas & Betts H250GR-TB is designed to connect 2-1/2-inch threaded rigid metal conduit (RMC) or intermediate metal conduit (IMC) to threadless enclosures while providing a positive grounding path and a watertight seal. Its die-cast zinc construction, thermoplastic insulated throat, and embedded nitrile (BUNA-N) sealing ring protect conductors from abrasion while preventing moisture ingress. The grounding hub is ideal for commercial buildings, industrial facilities, power distribution systems, wastewater treatment plants, petrochemical facilities, and outdoor electrical installations requiring durable conduit bonding and environmental protection.

Technical Specifications:

• Brand: Thomas & Betts (ABB) – T&B® Rigid Fittings
• Part Number: H250GR-TB
• Product Type: Grounding Conduit Hub
• Trade Size: 2-1/2 in.
• Material: Die-Cast Zinc Hub and Locknut
• Connection Type: Threaded NPT
• Compatible Conduit: Rigid Metal Conduit (RMC) and Intermediate Metal Conduit (IMC)
• Insulating Throat: Molded Thermoplastic, 105°C Temperature Rating, UL 94 V-0 Flammability Rating
• Sealing Ring Material: Nitrile (BUNA-N)
• Maximum Panel Thickness: 1/4 in.
• Throat Diameter: 2-13/32 in.
• Features: Bonding/Grounding Locknut, Watertight Construction, Embedded Nitrile Sealing Ring, Insulated Throat to Prevent Wire Abrasion
• Application: Threadless Boxes and Electrical Enclosures
• Standards: UL Listed (E23018), CSA Certified
• Compliance: RoHS3 Compliant, REACH Compliant
• Typical Applications: Panelboards, Switchgear, Motor Control Centers, Outdoor Enclosures, Industrial Machinery, Power Distribution Equipment, Hazardous Location Electrical Systems

Common Replacements:

• Thomas & Betts H200GR-TB
• Thomas & Betts H300GR-TB
• Thomas & Betts H250-TB