3M 7000031374 Copper Barrel Connector 35 Kv 3/0 Awg

Product Description

The 3M 7000031374 is a copper standard barrel connector designed for splicing copper conductors in medium-voltage electrical applications up to 35 kV. Sold individually, this connector is constructed from one-piece, seamless, high-conductivity copper for reliable, low-resistance joints. It measures 2.130 inches in length with an inner diameter of 0.490 inches and an outer diameter of 0.617 inches. The orange color coding identifies the 3/0 AWG conductor size at a glance, helping electricians maintain accuracy during installation. This connector is intended for copper conductors only and is not rated for aluminum or copper-clad aluminum wire.

This barrel connector is suited for medium-voltage distribution and power cable splicing work in residential, commercial, and industrial settings. Typical applications include underground cable joints, switchgear terminations, and utility distribution systems where a compact, seamless splice fitting is required. Licensed electricians and utility cable splicers working on copper conductor runs will find this fitting appropriate for direct-burial and conduit-installed cable assemblies operating at voltages up to 35 kV.

Key Features

• One-piece seamless copper construction for consistent conductivity and mechanical strength
• Rated for use up to 35 kV on medium-voltage copper conductor systems
• Sized for 3/0 AWG copper conductors
• Orange color coding for quick AWG identification in the field
• Compact profile: 2.130 inches long, 0.490 inches I.D., 0.617 inches O.D.
• Compatible with copper conductors only — not rated for aluminum wire

Compatibility

Designed as an OEM-style replacement barrel connector for medium-voltage copper conductor splicing applications requiring a 3/0 AWG, up to 35 kV rated fitting.

Installation Notes

Installation should be performed by a licensed electrician or qualified cable splicer in accordance with the National Electrical Code (NEC) and applicable local codes. De-energize and verify the absence of voltage on all conductors before beginning any splice work. Use the correct compression tooling specified for this connector size to achieve a proper mechanical and electrical connection. This connector is rated for copper conductors only — do not use on aluminum or copper-clad aluminum cable.

Technical Specifications

• Voltage Rating: Up to 35 kV
• Conductor Size: 3/0 AWG
• Conductor Material Compatibility: Copper only
• Length: 2.130 inches
• Inner Diameter (I.D.): 0.490 inches
• Outer Diameter (O.D.): 0.617 inches
• Material: High-conductivity copper, seamless one-piece
• Color: Orange
• Weight: 0.09 pounds
• Unit of Measure: Each
• Minimum Order Quantity: 10

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000031374