Thomas Betts 54155-TB Square Ring Terminal 1/0 Awg

Product Description

The THOMAS BETTS 54155-TB is a non-insulated square ring terminal designed for compression-style wire termination on 1/0 AWG conductors. The copper contact body features a tin (TiN) plating for corrosion resistance and reliable conductivity at the connection point. At 2.2 inches in overall length and 0.75 inches wide, this terminal accommodates a 1/2-inch stud. It is commonly installed by licensed electricians and industrial maintenance technicians in panel wiring, grounding applications, and heavy-gauge feeder connections where a secure, low-resistance mechanical crimp is required.

This terminal is suited for commercial and industrial electrical installations where 1/0 AWG stranded or solid copper conductors require a permanent, compression-crimped ring lug termination. Typical applications include bus bar connections, equipment grounding, motor lead terminations, and switchgear wiring. The square ring geometry provides consistent contact area against flat bus surfaces or standard hardware.

Key Features

• Non-insulated square ring design for 1/0 AWG compression terminations
• Copper contact with TiN (tin) plating for corrosion resistance and conductivity
• Fits 1/2-inch stud hardware
• Overall length of 2.2 inches; ring width of 0.75 inches; barrel thickness of 0.1300 inches
• CSA Certified, UL Listed, and RoHS Compliant
• Pink color coding for visual wire-gauge identification

Compatibility

Designed as an OEM-style compression ring terminal for 1/0 AWG conductors terminated at 1/2-inch stud hardware in commercial and industrial electrical assemblies.

Installation Notes

Installation must be performed by a qualified electrician in accordance with applicable NEC requirements. De-energize and lock out the circuit before crimping or connecting this terminal. Use a ratcheting compression crimp tool rated for 1/0 AWG terminals to achieve a full, reliable crimp — never use pliers or an undersized tool. Verify torque on the stud fastener per the equipment manufacturer specifications before restoring power.