Southwire CBGI350 Insulated Grounding Bushing 3.5 in

Product Description

The SOUTHWIRE CBGI350 is an insulated grounding bushing designed for use with rigid metal conduit and intermediate metal conduit installations. This fitting provides a bonding and grounding connection point at conduit terminations where a threaded entry is required. The insulated throat protects wire insulation from abrasion where conductors enter the conduit end. Electricians install this bushing as part of a compliant equipment grounding path on conduit systems in commercial and residential wiring applications.

The CBGI350 is sized for 3.5-inch conduit trade size, making it suitable for larger conduit runs commonly found in commercial electrical distribution, service entrance installations, and industrial panel feeds. It is listed as a cross-reference replacement for Madison Electric CBGI-350 and Topaz 339, allowing direct substitution on existing jobs or when sourcing alternatives.

Key Features

• Insulated throat protects conductor insulation at conduit terminations
• Provides a grounding and bonding lug connection point for equipment grounding conductors
• Sized for 3.5-inch trade-size rigid or intermediate metal conduit
• Cross-references Madison Electric CBGI-350 and Topaz 339 for direct substitution
• Malleable construction for durability in conduit termination service

Compatibility

Listed as a direct replacement for Madison Electric CBGI-350 and Topaz 339. Designed for use with 3.5-inch trade-size rigid metal conduit (RMC) and intermediate metal conduit (IMC) threaded terminations.

Installation Notes

Installation is performed by a licensed electrician. De-energize the circuit and panel before beginning any conduit termination work. Thread the bushing onto the conduit end and secure before pulling conductors through to prevent insulation damage. Installation should comply with NEC Article 250 requirements for equipment grounding and bonding at conduit terminations.