Abb 225-tb 1-1/4 Inch Insulated Conduit Bushing

Product Description

The ABB 225-tb is a 1-1/4 inch non-metallic insulated conduit bushing designed to protect wire insulation at the end of rigid metal conduit and IMC conduit installations. Manufactured from plastic, this threaded bushing slips onto the conduit end and provides a smooth, insulated surface that prevents conductors from contacting sharp conduit threads or edges. It is a standard component in commercial and residential electrical rough-in work wherever rigid or IMC conduit terminates at a panel, enclosure, or junction box. Electricians install this bushing as part of code-compliant conduit termination practice.

The 225-tb is suited for use in rigid conduit and IMC conduit systems at the 1-1/4 inch trade size. It is commonly installed at panel knockouts, pull boxes, and enclosure entries in both new construction and retrofit electrical work. The non-metallic plastic construction makes it appropriate in applications where a non-conductive bushing material is preferred. The threaded connection type ensures a secure, low-profile fit on standard conduit threads without additional fasteners or tools.

Key Features

• 1-1/4 inch trade size fits standard rigid and IMC conduit threads
• Non-metallic plastic construction provides electrical insulation at conduit termination points
• Threaded connection type for secure, tool-free installation onto conduit ends
• Outside diameter of approximately 1.905 inches (48.41 mm) for compact panel entry fitment
• Sold in box quantities of 100, suitable for bulk jobsite use

Compatibility

Designed for use with 1-1/4 inch rigid metal conduit and IMC conduit systems as an insulated termination bushing.

Installation Notes

Installation is performed by licensed electricians in accordance with applicable NEC requirements for conduit terminations. De-energize all circuits in the enclosure or panel before installing or adjusting conduit fittings. Thread the bushing onto the conduit end by hand until snug, ensuring the insulated flange seats fully before pulling conductors through. Inspect the bushing seat for any cracks or deformation before use, as damaged bushings should not be installed.

Technical Specifications

• Trade Size: 1-1/4 inch
• Outside Diameter: 1.905 inches (48.41 mm)
• Material: Plastic (Non-Metallic)
• Connection Type: Threaded
• Type: Insulated Bushing
• Application: Rigid and IMC Conduit
• Box Quantity: 100

Standard Information

• Brand: ABB
• Manufacturer Part Number: 225-tb