Abb 2B40X Two-bolt Copper Connector 1/0-4/0 Awg Top Rated

The ABB 2B40X is a one-piece, two-bolt copper connector designed for making secure, permanent electrical connections without a spacer. Built from copper, it accommodates a main wire range of 1/0 to 4/0 AWG stranded and a tap range of 6 AWG solid to 4/0 AWG stranded, making it well suited for heavy-duty conductor terminations in power distribution work. The 9/16-inch bolt size provides the clamping force needed to maintain a low-resistance, code-compliant connection under load. Licensed electricians and line workers are the primary installers of this connector type.

The 2B40X is used in commercial and industrial electrical installations where two-bolt clamp connectors are required for splicing or tapping large-gauge copper conductors. Typical applications include switchgear, panelboard tap connections, transformer secondary terminations, and service-entrance wiring where conductor sizes in the 1/0 to 4/0 AWG range are common. The absence of a spacer makes this version appropriate for installations where a compact, single-piece clamp body is preferred or required by the installation layout.

Key Features

• One-piece two-bolt clamp body — no spacer required
• Main conductor range: 1/0 to 4/0 AWG stranded
• Tap conductor range: 6 AWG solid to 4/0 AWG stranded
• Bolt size: 9/16 inch for consistent, high-clamping-force termination
• Copper construction for reliable conductivity and corrosion resistance

Compatibility

Designed as an OEM-style mechanical connector for copper conductors in the 1/0 to 4/0 AWG range in commercial, industrial, and utility electrical distribution applications.

Installation Notes

Installation should be performed by a licensed electrician in accordance with NEC requirements for mechanical connectors. De-energize and lock out the circuit before making any conductor connections. Torque the 9/16-inch bolts using an appropriate torque wrench to the value specified by the authority having jurisdiction or the installation code in effect — do not rely on feel alone for large-conductor terminations. Verify conductor insulation is stripped to the correct length and that conductor strands are not damaged or frayed before seating in the connector body.

Technical Specifications

• Connector Type: Two-Bolt Clamp, One-Piece Without Spacer
• Material: Copper
• Main Wire Range: 1/0 to 4/0 AWG Stranded
• Tap Wire Range: 6 AWG Solid to 4/0 AWG Stranded
• Bolt Size: 9/16 inch
• UPC: 783786400102

Standard Information

• Brand: ABB
• Manufacturer Part Number: 2B40X