Southwire CBGI150 Insulated Grounding Bushing 1-1/2 in

Product Description

The SOUTHWIRE CBGI150 is an insulated grounding bushing designed for use with rigid metal conduit and IMC installations. It provides a secure grounding path at conduit termination points while the insulated throat protects wire insulation from abrasion at the conduit end. Sized for 1-1/2 inch trade size conduit, this bushing is a standard component in commercial and residential electrical rough-in work. Electricians rely on this type of fitting to meet NEC grounding continuity requirements at panel knockouts and junction box entries.

The CBGI150 is used wherever 1-1/2 inch rigid metal conduit or IMC terminates at an enclosure, panel, or junction box requiring both grounding continuity and conductor insulation protection. It is a common fitting in commercial electrical construction, industrial panels, and service entrance work. This bushing is also cross-referenced as Madison Electric CBGI-150 and Topaz 335, making it a widely recognized replacement option across multiple supplier catalogs.

Key Features

• Insulated throat protects conductors from abrasion at conduit termination points
• Provides grounding continuity at enclosure knockouts per NEC requirements
• Fits 1-1/2 inch trade size rigid metal conduit and IMC
• Cross-referenced with Madison Electric CBGI-150 and Topaz 335

Compatibility

Compatible with 1-1/2 inch trade size rigid metal conduit (RMC) and intermediate metal conduit (IMC). Also referenced as Madison Electric CBGI-150 and Topaz 335.

Installation Notes

Installation is performed by a licensed electrician. De-energize the panel or enclosure before working at any knockout entry point. The bushing threads onto the conduit end and is tightened using a conduit bushing wrench or spanner. Verify grounding conductor connection and torque per the enclosure manufacturer instructions and applicable NEC requirements.

Technical Specifications

• Trade Size: 1-1/2 inches
• Conduit Type: Rigid Metal Conduit (RMC), Intermediate Metal Conduit (IMC)

Standard Information

• Brand: SOUTHWIRE
• Manufacturer Part Number: CBGI150