Nsi Industries 257-US 3 Inch Steel Emt Coupling

Product Description

The NSI INDUSTRIES 257-US is a 3-inch steel EMT coupling designed for joining sections of electrical metallic tubing in conduit runs. Built to domestic manufacturing standards, this set-screw style fitting provides a secure, low-resistance connection between EMT conduit lengths. It is constructed from steel for durability in commercial and industrial electrical installations. Licensed electricians and electrical contractors install this coupling as part of branch circuit and feeder conduit systems in compliance with NEC requirements.

This coupling is suited for use in commercial, industrial, and residential electrical installations where 3-inch EMT conduit is specified. It is appropriate for interior conduit runs in dry or damp locations where EMT is a code-accepted wiring method. The fitting is manufactured in the USA, making it a practical choice for projects with domestic-content requirements.

Key Features

• Fits 3-inch EMT conduit for large-diameter branch circuit and feeder runs
• Steel construction provides mechanical strength and durability
• Manufactured in the USA
• Compatible with standard EMT set-screw coupling installation methods

Compatibility

Designed as an OEM-style replacement and standard fitting for 3-inch EMT conduit systems in commercial and residential electrical applications.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC articles governing EMT wiring methods. De-energize all circuits before working on any conduit system. Ensure conduit ends are reamed and free of burrs before seating into the coupling. Do not use EMT couplings in locations requiring rigid conduit unless local code permits substitution.

Technical Specifications

• Conduit Size: 3 inches
• Material: Steel
• Country of Origin: USA
• Package Dimensions (L x W x H): 7.75 inches x 6 inches x 5.62 inches
• UPC: 78174702257

Standard Information

• Brand: NSI INDUSTRIES
• Manufacturer Part Number: 257-US