3M 7000031400 Copper Long Barrel Lug 3/0 Awg 35 Kv

Product Description

The 3M 7000031400 is a copper one-hole long-barrel lug designed for terminating copper conductors in high-voltage electrical applications rated up to 35 kV. Manufactured as a single-piece, seamless unit from high-conductivity copper, this lug delivers reliable electrical continuity and mechanical strength at the termination point. It features a 1/2-inch stud size, a 0.490-inch inside diameter, and a barrel length of 3.130 inches, making it well suited for 3/0 AWG copper conductors. Licensed electricians and utility technicians install this lug in medium-voltage distribution and termination assemblies where consistent, low-resistance connections are required.

This lug is intended for use with copper conductors only and is appropriate for medium-voltage cable termination work in both commercial and industrial electrical systems. Its long-barrel design provides extended contact area between the conductor and lug body, supporting secure mechanical crimping. Typical applications include switchgear terminations, transformer connections, and medium-voltage cable splicing where up to 35 kV insulation class is specified.

Key Features

• One-piece seamless construction eliminates potential failure points at weld seams
• High-conductivity copper material supports low-resistance electrical terminations
• Rated for use up to 35 kV in medium-voltage applications
• Long-barrel design provides increased conductor contact area for reliable crimps
• 1/2-inch stud hole accommodates standard fastener hardware
• Sized for 3/0 AWG copper conductors with a 0.490-inch inside diameter

Compatibility

Designed for use with 3/0 AWG copper conductors only in medium-voltage termination assemblies rated up to 35 kV. Not suitable for aluminum conductors.

Installation Notes

Installation should be performed by a licensed electrician following applicable NEC requirements and local jurisdiction codes. De-energize and verify the absence of voltage on all conductors before beginning termination work. Use a calibrated crimping tool rated for the conductor size and lug type to ensure a proper mechanical and electrical connection. Do not install on aluminum conductors, as this lug is rated for copper conductors only.

Technical Specifications

• Conductor Size: 3/0 AWG
• Voltage Rating: Up to 35 kV
• Inside Diameter: 0.490 inches
• Barrel Length: 3.130 inches
• Stud Size: 1/2 inch
• Material: Seamless high-conductivity copper
• Conductor Compatibility: Copper only
• Weight: 0.11 pounds

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000031400