Thomas Betts 17057-BD Ring Terminal 4/0 Awg

Product Description

The THOMAS BETTS 17057-BD is a 4/0 AWG copper ring terminal designed for high-current electrical terminations in industrial, commercial, and trade electrical applications. The copper contact body is finished with a tin (TiN) plating that resists corrosion and oxidation, supporting long-term connection integrity at the lug interface. Ring terminals of this gauge are used where large-conductor wire runs must be securely fastened to bus bars, battery terminals, motor lugs, and panel termination points. Licensed electricians and electrical contractors are the typical installers of components at this conductor size.

This terminal is rated for 4/0 AWG wire and suits applications involving large-gauge copper conductors in power distribution, generator hookups, inverter wiring, and heavy motor circuits. The copper contact construction supports high conductivity requirements common in these environments. Sold as individual units with a minimum order quantity of 5 pieces per transaction.

Key Features

• Rated for 4/0 AWG wire — suitable for heavy-duty high-current terminations
• Copper contact material provides high conductivity at the termination point
• Tin (TiN) contact plating resists corrosion and oxidation over time
• Ring-style lug design allows secure bolted connection to studs and bus bars
• Sold per piece with a minimum order quantity of 5 units

Compatibility

Designed for use with 4/0 AWG copper conductors in standard ring terminal applications across power distribution, motor, and panel wiring installations.

Installation Notes

Installation of 4/0 AWG ring terminals should be performed by a licensed electrician in accordance with NEC requirements for large-conductor terminations. De-energize and lock out the circuit before crimping or fastening the terminal. Use a calibrated ratchet-style crimping tool sized for 4/0 AWG to achieve a proper mechanical and electrical connection. Do not over-torque the fastener at the lug seat, as this can damage the terminal barrel or mating stud.