Morris 94390 Copper Long-Barrel Compression Lug, 500 MCM, 1/2" Stud, 2-Hole

Product Overview

The Morris 94390 is a long-barrel compression lug designed to terminate a 500 MCM copper conductor to a 1/2" stud with two mounting holes. It is manufactured from high-conductivity seamless copper with electro-tin plating and a brown color-coded die index printed on the barrel.

This lug is UL 486AB listed for applications through 35 kV, features dual mounting holes for secure contact, and includes an inspection window and crimp marks to guide proper installation.

Key Features

• For 500 MCM copper conductors; terminates to a 1/2" stud
• High-conductivity seamless copper with electro-tin plating
• Long barrel accommodates multiple crimps and shows crimp marks
• Brown color-coded die index printed on barrel for correct die selection
• Two mounting holes for improved contact integrity
• UL 486AB listed for applications through 35 kV
• Inspection window to verify conductor insertion

What this lug does

The Morris 94390 provides a durable mechanical and electrical connection between a 500 MCM copper conductor and equipment or buswork using a 1/2" stud. Its long barrel design supports multiple crimps for a secure conductor bite and its two-hole tongue helps maintain contact integrity under load.

• Terminating 500 MCM copper to a 1/2" bolt or stud
• Long barrel accommodates full conductor insertion and multiple crimps
• Dual mounting holes improve clamp/contact stability

Typical applications

Use the 94390 where a 500 MCM copper conductor must be fastened to panels, bus bars, electrical equipment, or other terminations that accept a 1/2" stud. The tin-plated copper construction resists corrosion in standard electrical service environments.

• Power distribution panels and bus connections
• Industrial and commercial electrical equipment terminations
• Where UL 486AB listing through 35 kV is required

Installation and crimping

Install by stripping the conductor to the barrel depth, fully inserting the conductor through the inspection window, and crimping using the Brown-coded die. After crimping, attach the lug tongue to the 1/2" stud and secure with the appropriate hardware. Follow industry-standard crimp tooling and procedures for compression lugs.

• Strip conductor to match barrel depth and verify via inspection window
• Use Brown-coded die (die index printed on barrel) for correct crimp profile
• Bolt tongue to a 1/2" stud using appropriate torque for the application

Key specifications

The following specifications describe the electrical and mechanical characteristics provided by the manufacturer for this exact SKU.

• Conductor size: 500 MCM (copper)
• Stud size: 1/2"
• Mounting: 2-hole tongue
• Material: Seamless copper, electro-tin plated
• Barrel: Long barrel with crimp marks and inspection window
• Die color code: Brown
• Listing: UL 486AB through 35 kV

Before You Order

Confirm the model number and required quantity before ordering. Verify that the conductor is copper and sized 500 MCM and that the mating stud accepts a 1/2" bolt. Ensure your crimp tooling matches the Brown die profile indicated on the barrel.

• Verify conductor material and size: 500 MCM copper
• Verify mating stud/bolt size: 1/2"
• Confirm use of Brown-coded die and appropriate compression tooling

Ordering from Lumera Electric

Check the purchasing options shown on the Lumera Electric product page for Morris 94390 Copper Long-Barrel Compression Lug, 500 MCM, 1/2" Stud, 2-Hole. For project quantities or additional ordering requirements, use Request a Quote and provide the required quantity.