3M 7000031380 Copper Long-barrel Connector 2/0 Awg

Product Description

The 3M 7000031380 is a copper long-barrel connector rated for use on copper conductors up to 35 kV. Manufactured as a one-piece, seamless, high-conductivity copper unit, it is designed for secure, low-resistance terminations in medium-voltage electrical systems. The connector accepts 2/0 AWG conductors, features a 0.439-inch inner diameter, and measures 3.13 inches in length. It is installed by licensed electricians working on medium-voltage distribution, underground feeder, and cable splicing applications where long-barrel geometry provides added contact area and pull-out resistance.

This connector is suited for medium-voltage copper conductor terminations in utility, industrial, and commercial electrical installations rated up to 35 kV. The long-barrel design accommodates applications where extended crimp length is required for mechanical and electrical integrity. It is typically used in cable jointing, switchgear connections, and underground distribution work where reliable, high-conductivity terminations are critical.

Key Features

• Rated up to 35 kV for medium-voltage applications
• One-piece, seamless construction in high-conductivity copper
• Accepts 2/0 AWG copper conductors only
• Inner diameter of 0.439 inches for consistent conductor fit
• Long-barrel design provides extended crimp zone for added pull-out resistance
• Length of 3.13 inches for compatibility with standard medium-voltage tooling

Compatibility

Designed for use with copper conductors only at 2/0 AWG. Not rated for aluminum conductors. Suitable for medium-voltage cable termination and splicing systems up to 35 kV.

Installation Notes

Installation must be performed by a qualified electrician in accordance with NEC requirements and applicable local electrical codes. De-energize and verify the absence of voltage on all conductors before beginning termination work. Use only manufacturer-specified compression tooling and die sets appropriate for 2/0 AWG long-barrel connectors to ensure a proper crimp. Do not use this connector on aluminum conductors.

Technical Specifications

• Wire Size: 2/0 AWG
• Voltage Rating: Up to 35 kV
• Inner Diameter: 0.439 inches
• Length: 3.13 inches
• Material: High-conductivity copper, one-piece seamless
• Color: Black
• Weight: 0.11 pounds
• Sold As: Each

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000031380