Thomas Betts ADR11 Square Ring Terminal 14 to 1/0 Awg

Product Description

The THOMAS BETTS ADR11 is a non-insulated square ring terminal designed for compression connections in electrical wiring applications. It accommodates wire sizes from 14 to 1/0 AWG and features an aluminum contact with a TiN (titanium nitride) plating for reliable conductivity. Measuring 1-15/32 inches in overall length and 5/8 inches in width, with a 3/16-inch thickness, this terminal is built to handle a range of conductor sizes in a compact form factor. It is installed by licensed electricians and electrical contractors working on panel connections, equipment grounding, and distribution wiring where a square ring lug is specified.

This terminal is suited for residential and commercial electrical installations where aluminum conductors require a secure, compression-style termination to a 1/4-inch stud. Common applications include service entrance wiring, load center connections, and equipment terminations that call for a non-insulated square ring lug. The compression connection style ensures consistent contact between the conductor and terminal without relying on solder or mechanical screws.

Key Features

• Non-insulated square ring design for 1/4-inch stud mounting
• Accepts 14 to 1/0 AWG wire via compression connection
• Aluminum contact with TiN plating for corrosion resistance and conductivity
• Overall length of 1-15/32 inches, ring width of 5/8 inches, thickness of 3/16 inches
• CSA Certified and UL Listed (UL File E9809)
• RoHS Compliant

Compatibility

Designed as an OEM-style compression ring terminal for use with 14 to 1/0 AWG aluminum conductors terminating to 1/4-inch studs in electrical panels, load centers, and equipment connection points.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC guidelines for conductor terminations. De-energize and lock out the circuit before installing or removing any terminal lug. Use a calibrated compression crimping tool rated for the AWG range being terminated to ensure a secure, low-resistance connection. Do not over-crimp or substitute incompatible tooling, as improper crimping can compromise contact integrity.