Nsi Industries 4157-DC Combination Coupling 3/4 Inch

Product Description

The NSI INDUSTRIES 4157-DC is a 3/4 inch combination coupling designed for conduit installations in electrical wiring systems. This fitting allows electricians to join dissimilar conduit types at a single connection point, bridging the transition between rigid metal conduit and electrical metallic tubing where needed. The 4157-DC is a practical, field-tested solution for conduit runs that require a change in conduit type without additional adapters or junction hardware. Licensed electricians and electrical contractors install this coupling as part of branch circuit and feeder wiring work in both new construction and retrofit applications.

This combination coupling is suited for residential, commercial, and light industrial conduit installations. It is typically used where a conduit run transitions between rigid conduit and EMT, a common scenario in panel feeds, junction runs, and service entrance work. The compact form factor allows installation in tight spaces without compromising a secure, code-compliant connection.

Key Features

• 3/4 inch trade size for standard conduit runs
• Combination design joins dissimilar conduit types at a single fitting
• Compact package dimensions allow use in confined installation areas
• OEM-style fitment supports direct replacement in existing conduit systems

Compatibility

Designed as an OEM-style replacement fitting for 3/4 inch conduit systems requiring a combination coupling connection between dissimilar conduit types.

Installation Notes

Installation should be performed by a licensed electrician in accordance with the National Electrical Code (NEC). De-energize the circuit and verify the absence of voltage before working on or near any conduit system. Ensure conduit ends are deburred and clean before seating the coupling. Secure the fitting fully to maintain the mechanical and electrical continuity of the conduit system.

Technical Specifications

• Trade Size: 3/4 inch
• Package Length: 6.5 inches
• Package Width: 5.5 inches
• Package Height: 4.62 inches
• UPC: 78174794157

Standard Information

• Brand: NSI INDUSTRIES
• Manufacturer Part Number: 4157-DC