Thomas Betts BG400-14-20 Conduit Bushing 4 Inch Rigid Imc

Product Description

The THOMAS BETTS BG400-14-20 is a partially insulated conduit bushing designed for use with rigid metal conduit and intermediate metal conduit (IMC) installations. Built from malleable iron, this bushing provides a durable, straight-connector fitting that protects wire insulation at conduit terminations and prevents abrasion where conductors enter enclosures, panels, or junction boxes. The lug screw connection type allows secure attachment to the conduit end, and the partial insulation sleeve reduces the risk of conductor damage at the bushing throat. Licensed electricians install this fitting as part of a compliant conduit system roughed in to NEC standards.

This bushing is sized for 4-inch trade size conduit, making it appropriate for larger commercial or industrial installations where high-capacity conduit runs terminate at switchgear, motor control centers, panelboards, or large enclosures. The malleable iron construction stands up to the mechanical demands of these environments. It is installed as a termination fitting on rigid or IMC conduit ends before conductors are pulled through, ensuring a clean, code-appropriate transition into the connected equipment.

Key Features

• Fits 4-inch trade size rigid metal conduit and IMC
• Malleable iron construction for durability in demanding commercial and industrial environments
• Partially insulated throat protects conductor insulation from abrasion at conduit termination points
• Lug screw connection type for secure mechanical attachment
• Straight connector shape for standard conduit end terminations

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 4-inch trade size rigid metal conduit and intermediate metal conduit (IMC) systems.

Installation Notes

This fitting is installed by a licensed electrician as part of a permitted conduit wiring system. De-energize and lock out all circuits before working on any conduit termination. The bushing is threaded onto the conduit end before the conduit is secured to the enclosure knockout, and conductors are pulled through after the fitting is seated. Follow applicable NEC requirements for conduit fill, grounding, and bushing use at conductor termination points.