Abb 201 4 Inch Square Extension Ring 1/2 Inch

Product Description

The ABB 201 is a 4-inch square electrical extension ring with a 1/2-inch raise, used to increase the interior volume of a flush-mounted square electrical box. Electricians install this ring when box fill calculations require additional cubic-inch capacity to meet NEC requirements. The ring mounts directly to a standard 4-inch square box, extending the box face outward by 1/2 inch to accommodate more conductors, devices, or splices. It is a standard component in residential and commercial rough-in and finish electrical work.

This extension ring is suited for use in junction box and device box installations where conductors or splices exceed the capacity of a single-gang or multi-gang square box. Common applications include panel feeders, branch circuit junction points, and device rough-in locations in wall, ceiling, or floor installations. Sold in carton quantities of 50 units, making it practical for new construction and retrofit projects requiring multiple boxes.

Key Features

• 4-inch square footprint matches standard 4-inch square electrical boxes
• 1/2-inch raise increases box fill volume to support NEC fill compliance
• Designed for flush-mount installation in wall, ceiling, or floor assemblies
• Carton quantity of 50 units supports bulk installation projects

Compatibility

Designed as an OEM-style replacement and standard fitment extension ring for 4-inch square electrical boxes used in residential and commercial electrical installations.

Installation Notes

Installation is performed by a licensed electrician in accordance with the National Electrical Code (NEC). De-energize all circuits and verify with a voltage tester before working on or near any electrical box. The ring should be secured to the existing square box using the manufacturer-provided mounting tabs or screws before pulling conductors. Do not exceed the combined box fill cubic-inch rating per NEC Article 314 after adding the extension ring volume.

Technical Specifications

• Box Size: 4 inches square
• Raise Height: 1/2 inch
• Carton Quantity: 50 per carton
• Carton Dimensions (L x W x H): 20.88 inches x 9 inches x 8.5 inches
• Carton Weight: 22.3 pounds
• UPC: 05016990201

Standard Information

• Brand: ABB
• Manufacturer Part Number: 201