Southwire CBGI400 Insulated Grounding Bushing 4 in

Product Description

The SOUTHWIRE CBGI400 is an insulated grounding bushing designed for use on rigid metal conduit and intermediate metal conduit terminations. It provides a reliable grounding path while protecting conductors from sharp conduit edges with its insulated throat. Electricians install this bushing at panel knockouts, enclosures, and junction boxes where code requires a grounded and insulated conduit termination. The bushing fits 4-inch conduit trade size and is built to withstand the demands of commercial and industrial electrical installations.

This grounding bushing is used in commercial and industrial electrical systems where rigid or intermediate metal conduit terminates at enclosures, switchboards, panelboards, and pull boxes. It is a standard component in new construction and retrofit work wherever conduit grounding continuity and conductor protection are required at the termination point. Compatible part references noted in trade include Madison Electric CBGI-400 and Topaz 340, indicating common cross-reference use across electrical supply channels.

Key Features

• Insulated throat protects conductors from abrasion at conduit terminations
• Provides a bonding and grounding connection point at the bushing lug
• Fits 4-inch trade size rigid metal conduit and intermediate metal conduit
• One year limited warranty

Compatibility

Cross-references with Madison Electric CBGI-400 and Topaz 340. Designed as an OEM-style replacement insulated grounding bushing for 4-inch conduit termination applications.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements for grounding and bonding of metal conduit systems. De-energize all circuits at the panel before beginning termination work. Thread the bushing onto the conduit end and secure before pulling conductors through to avoid conductor damage. Connect the grounding conductor to the bushing lug and ensure a continuous bonding path to the enclosure.

Technical Specifications

• Trade Size: 4 inches
• Length: 9.0 inches
• Height: 6.2 inches
• Width: 9.1 inches
• Weight: 4.8 pounds
• Warranty: One Year Limited
• Country of Origin: China

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: CBGI400