Thomas Betts ADR21 Rectangle Ring Terminal 14-2/0 Awg

Product Description

The THOMAS BETTS ADR21 is a non-insulated rectangle ring terminal designed for compression connections in electrical wiring applications. It accommodates wire sizes from 14 to 2/0 AWG and features an aluminum contact with a titanium nitride (TiN) plating for reliable conductivity and corrosion resistance. Measuring 1-15/32 inches in overall length and 5/8 inches in ring width, with a 3/16-inch thickness, this terminal is built for secure, space-efficient terminations. It suits licensed electricians and electrical contractors working on panel connections, equipment grounding, and related wiring assemblies where a non-insulated ring lug is required.

This terminal is suited for use in residential, commercial, and light industrial electrical installations where aluminum conductors require a solid mechanical and electrical connection. The 1/4-inch stud size fits standard bus bars, terminal blocks, and equipment lugs commonly found in electrical panels and distribution equipment. It is appropriate for use with compression tooling rated for the applicable AWG range.

Key Features

• Non-insulated rectangle ring design for compact, direct terminations
• Accepts wire sizes 14 to 2/0 AWG for broad application coverage
• Compression connection type ensures a gas-tight, mechanically secure crimp
• Aluminum contact with TiN plating for conductivity and corrosion resistance
• 1/4-inch stud size fits standard panel and equipment hardware
• CSA Certified, UL Listed (UL File E9809), and RoHS Compliant

Compatibility

Designed as an OEM-style compression ring terminal for use with aluminum conductors in standard electrical termination applications requiring a 1/4-inch stud size and non-insulated rectangle ring configuration.

Installation Notes

Installation should be performed by a licensed electrician in accordance with applicable NEC requirements. De-energize and lock out the circuit before terminating any conductors. Use compression tooling rated and calibrated for the applicable AWG range to achieve a proper crimp. Do not substitute hand tools or non-rated crimp dies, as an improper crimp can result in high-resistance connections or terminal pull-out.