Appleton IBC-400L-25AC 4 Inch Insulated Grounding Bushing

Product Description

The APPLETON IBC-400L-25AC is a 4-inch insulated grounding bushing designed for use in electrical conduit installations where a reliable ground path and conductor protection are required at conduit termination points. The bushing combines an insulated throat to protect wire insulation from conduit threads with an integral grounding lug to establish a solid equipment grounding connection. It is installed by licensed electricians on rigid metal conduit or intermediate metal conduit systems in both commercial and industrial applications.

This insulated grounding bushing is suited for use at panel enclosures, junction boxes, and switchgear terminations where NEC requirements call for an insulated bushing on conduit 1.25 inches trade size and larger. The 4-inch trade size makes it appropriate for large-feeder conduit runs in commercial, industrial, and utility installations. Electricians installing service entrance conductors, large branch circuits, or feeder runs will encounter this fitting as a standard termination component.

Key Features

• 4-inch trade size fits standard 4-inch rigid metal conduit and IMC terminations
• Insulated throat protects conductor insulation from sharp conduit thread edges
• Integral grounding lug provides a dedicated equipment grounding connection point
• Compact form factor suitable for tight enclosure knockouts and panel terminations

Compatibility

Designed as an OEM-style grounding bushing for use with 4-inch rigid metal conduit and intermediate metal conduit terminations in standard electrical enclosures and panelboards.

Installation Notes

Installation must be performed by a qualified electrician in accordance with the National Electrical Code (NEC). De-energize and lock out the circuit or panel before installing or removing conduit fittings. Thread the bushing fully onto the conduit end and torque securely before terminating the grounding conductor at the lug. Verify that the grounding conductor size meets NEC Table 250.122 requirements for the overcurrent device protecting the circuit.

Technical Specifications

• Trade Size: 4 inches
• Package Dimensions (L x W x H): 6.8 inches x 5.2 inches x 2.0 inches
• Weight: 1.12 pounds
• UPC: 78312630348

Standard Information

• Brand: APPLETON
• Manufacturer Part Number: IBC-400L-25AC