Thomas Betts ADR21-21 Rectangle Ring Terminal 14-2/0 Awg

Product Description

The THOMAS BETTS ADR21-21 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 body with a titanium nitride (TiN) plating for reliable conductivity and corrosion resistance. The terminal measures 1-15/32 inches in overall length and 1-1/4 inches in width, with a 3/16-inch material thickness. It is designed for use with a 1/4-inch stud and is installed using standard compression tooling. Licensed electricians and electrical contractors typically specify this terminal for panel wiring, grounding, and equipment termination tasks.

This rectangle ring terminal is suited for both residential and commercial electrical installations where a secure, non-insulated compression lug is required. Its aluminum construction makes it appropriate for aluminum conductor terminations across a wide range of service entrance, load center, and equipment grounding applications. The 14 to 2/0 AWG wire range provides flexibility across multiple conductor sizes within a single terminal style.

Key Features

• Non-insulated rectangle ring design for compression termination
• Accepts 14 to 2/0 AWG wire — wide range in a single terminal style
• Aluminum contact body with TiN (titanium nitride) plating
• 1/4-inch stud size for standard panel and equipment mounting points
• Overall length of 1-15/32 inches, ring width of 1-1/4 inches, thickness of 3/16 inch
• RoHS compliant and UL Listed (UL File E9809)

Compatibility

Designed as an OEM-style compression ring terminal for use with 14 to 2/0 AWG aluminum conductors and 1/4-inch mounting studs in standard residential and commercial electrical assemblies.

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 a calibrated compression tool rated for the conductor size and terminal type to achieve a proper crimp — do not use open-barrel or non-compression methods. Inspect the completed termination for secure seating before re-energizing the circuit.