Appleton EC-250 Threaded 3-piece Conduit Coupling 2-1/2 in

Product Description

The APPLETON EC-250 is a threaded, three-piece conduit coupling designed to join two lengths of rigid metal conduit or IMC when neither length can be rotated. Constructed from zinc electroplated malleable iron, the EC-250 provides a concrete-tight seal rated for demanding commercial and industrial installations. The three-piece union design allows field assembly without spinning either conduit run, making it the correct choice when conduit is already fixed in position. It carries UL 514B and CSA C22.2 listings, confirming compliance with North American electrical installation standards. Licensed electricians and conduit installers working on rigid conduit systems rely on this coupling for code-compliant connections in concrete-encased and surface-mounted raceways.

The EC-250 is suited for commercial and industrial electrical installations where 2-1/2 inch trade size rigid metal conduit or IMC is used. Its concrete-tight construction makes it appropriate for applications where conduit runs pass through or are embedded in concrete, as well as exposed runs in wet or demanding environments. The three-piece union configuration is particularly useful during conduit repair or extension work where existing runs cannot be unthreaded and rotated.

Key Features

• Three-piece union design joins two conduit lengths when neither can be turned — essential for repair and fixed-run installations
• Concrete-tight construction meets requirements for conduit encased in or passing through concrete
• Zinc electroplated malleable iron construction provides corrosion resistance and mechanical strength
• UL 514B and CSA C22.2 listed for use in commercial and industrial raceway systems
• Threaded connection type compatible with standard rigid conduit and IMC threads
• 2-1/2 inch trade size with 4 inch overall length and 3-3/16 inch diameter

Compatibility

Rated for use on 2-1/2 inch trade size rigid metal conduit and IMC. Designed as a threaded three-piece union coupling for standard rigid conduit and IMC raceway systems in commercial and industrial applications.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements for rigid metal conduit and IMC systems. De-energize all circuits in the affected raceway before beginning conduit work. Thread both conduit ends fully into the coupling body before tightening the center locknut. Inspect threads for damage or contamination prior to assembly to ensure a secure, concrete-tight connection.

Technical Specifications

• Trade Size: 2-1/2 inches
• Type: Threaded, 3-Piece
• Overall Length: 4 inches
• Diameter: 3-3/16 inches (3.19 inches)
• Material: Zinc Electroplated Malleable Iron
• Constructional Feature: Concrete-Tight
• Used On: Rigid Conduit / IMC
• Application: Commercial / Industrial
• Approvals: UL 514B, CSA C22.2
• Weight: 25.5 pounds
• Country of Origin: MX

Standard Information

• Brand: APPLETON
• Manufacturer Part Number: EC-250