Bridgeport Fittings 388 3" Insulated Grounding Bushing, Malleable Iron with Lug

Bridgeport Fittings 388 3" Insulated Grounding Bushing, Malleable Iron with Lug

The Bridgeport Fittings 388 is a 3" insulated grounding bushing manufactured from malleable iron for use at the termination point of conduit runs where a secure, dependable ground connection is required. Electrical contractors specify insulated bushings like the 388 to protect conductor insulation from abrasion as wires transition from conduit into an enclosure, panel, or junction box. The integral lug built into this bushing gives installers a ready attachment point for a bonding jumper, helping maintain continuous equipment grounding throughout the raceway system. Specifying the correct insulated grounding bushing at each conduit termination helps installers maintain a continuous, low-impedance ground path back to the service, supporting a safer and more reliable electrical system. Constructed of malleable iron, the Bridgeport Fittings 388 is sized for 3" conduit and built to withstand the demands of everyday commercial and industrial installation work.

Key Features

• Trade Size: Sized for 3" conduit, matching common rigid and intermediate metal conduit (IMC) terminations found in commercial and industrial raceway systems.
• Malleable Iron Construction: The bushing body is manufactured from malleable iron, providing the strength and impact resistance needed to stand up to demanding jobsite conditions.
• Insulated Design: An insulated throat surrounds the opening where conductors pass through, shielding wire insulation from abrasion and chafing at the point of conduit entry.
• Integral Grounding Lug: A built-in lug gives installers a secure, convenient point to attach a bonding jumper and help maintain grounding continuity across the conduit system.
• Rugged Design: The one-piece malleable iron body is engineered to hold up to the mechanical stress of conduit installation and tightening.
• Model 388: Identified within the Bridgeport Fittings catalog as the 3" insulated grounding bushing with lug, making it easy to specify and reorder for future projects.

Technical Specifications

• Refer to manufacturer documentation for complete specifications.

Typical Applications

• Rigid and IMC Conduit Terminations
• Equipment Grounding and Bonding at Enclosures and Panels
• Panelboard, Junction Box, and Switchgear Entry Points
• Commercial and Industrial Electrical Installations
• Service Entrance Conduit Systems
• New Construction and Electrical Renovation Projects

Why Bridgeport Fittings?

Bridgeport Fittings builds the 388 grounding bushing from malleable iron for the strength and durability electrical professionals depend on, while the insulated throat and integral lug support proper, code-compliant grounding practices on every conduit run. Backed by solid, purpose-built construction, the Bridgeport Fittings 388 delivers a dependable 3" insulated grounding bushing designed to hold up to the demands of professional electrical installation work.