3M 7000031405 Copper Long Barrel Lug 500 Kcmil 35 Kv

Product Description

The 3M 7000031405 is a copper one-hole long barrel lug designed for terminating copper conductors in medium-voltage electrical systems rated up to 35 kV. Manufactured from one-piece, seamless, high-conductivity copper, this lug delivers low-resistance, reliable terminations in demanding power distribution applications. It features a 1/2 inch stud size, a 0.836 inch inner diameter, and an overall length of 4.500 inches. The seamless construction eliminates weak points associated with seamed or brazed barrel lugs, making it a dependable choice for licensed electricians and utility contractors working on medium-voltage cable terminations.

This lug is suited for medium-voltage power distribution installations, including utility, industrial, and commercial applications where copper conductors at 500 kcmil are terminated to switchgear, transformers, or bus connections. It is rated for use on copper conductors only and is appropriate for systems operating up to 35 kV. Licensed electricians and power system technicians typically install this lug in applications requiring secure, high-conductivity terminations.

Key Features

• One-piece seamless high-conductivity copper construction for reliable, low-resistance terminations
• Rated for medium-voltage systems up to 35 kV
• Compatible with 500 kcmil copper conductors
• 0.836 inch inner diameter barrel for proper conductor seating
• 4.500 inch barrel length provides extended contact surface area
• 1/2 inch stud hole for secure mechanical connection

Compatibility

Designed for use with 500 kcmil copper conductors only in medium-voltage electrical systems 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 codes for medium-voltage terminations. De-energize and verify absence of voltage on the circuit before beginning any termination work. Use a properly calibrated compression tool rated for the lug size to ensure a full, uniform crimp. Avoid over-crimping or under-crimping, as improper compression can compromise conductivity and mechanical integrity.

Technical Specifications

• Conductor Type: Copper only
• Conductor Size: 500 kcmil
• Voltage Rating: Up to 35 kV
• Stud Size: 1/2 inch
• Inner Diameter: 0.836 inches
• Barrel Length: 4.500 inches
• Material: Seamless high-conductivity copper
• Color Code: Brown
• Weight: 0.5 pounds
• Sold As: Each

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000031405