400 MCM Copper Compression Lug – 1-Hole, 1/2" Stud, Long Barrel | Conversions Tech
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SKU: 210-98077
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400 MCM Copper Compression Lug – 1-Hole, 1/2" Stud, Long Barrel | Conversions Tech
The Conversions Tech 400 MCM Copper Compression Lug is a robust, high-performance connector engineered for secure, low-resistance electrical terminations in demanding power systems. Designed for 400 MCM copper conductors, this lug features a single 1/2-inch stud hole and a long barrel construction that delivers superior mechanical strength and stable electrical performance.
Manufactured from seamless electro-tin plated copper, this tinned copper compression lug provides excellent corrosion resistance for long-term reliability in industrial, commercial, and power distribution environments. The distinctive blue color code allows for fast visual identification and compatibility with standard color-coding systems, helping reduce installation errors and speed up field work.
Key Features
- Premium Copper Construction: High-quality copper ensures excellent electrical conductivity and long service life.
- 400 MCM Conductor Size: Precision engineered for 400 MCM copper wire used in medium to heavy-duty power systems.
- 1-Hole Pad with 1/2" Stud: Provides a secure, stable attachment to bus bars and electrical equipment.
- Long Barrel Design: Extended barrel length supports multiple crimps for improved pull-out strength and consistent conductivity.
- Tin-Plated Finish: Protects against corrosion and oxidation while maintaining low electrical resistance.
- Chamfered Barrel Entry: Guides stranded conductors smoothly into the barrel for faster, cleaner installation.
- Blue Color Code: Enables quick identification and alignment with industry-standard color coding.
- Durable & Reliable: Built for long-lasting performance in industrial, commercial, and power distribution applications.
Common Applications
- Power distribution panels and switchgear
- Industrial electrical equipment and control panels
- Commercial electrical installations
- Renewable energy systems and battery storage
- Grounding and bonding using large copper conductors
Technical Specifications
| Material | Seamless Electro-Tin Plated Copper |
| Conductor Material | Copper |
| Conductor Size | 400 MCM |
| Stud Size | 1/2 Inch |
| Pad Holes | 1 |
| Barrel Type | Long Barrel |
| Barrel Entry | Chamfered |
| Color Code | Blue |
| Overall Length | 4.042 Inch |
| Barrel Length | 2.125 Inch |
| Barrel Size (ID × OD) | 0.75 Inch × 0.937 Inch |
| Die Index | I-76 |
| Pad Size | 1.25" L × 1.365" W × 0.187" Thick |
| Voltage Rating | 35 kV |
| Temperature Rating | 90°C |
Frequently Asked Questions (FAQs)
What conductor type is this compression lug designed for?
This lug is designed specifically for 400 MCM copper conductors and is not intended for aluminum wire.
What is the advantage of a long barrel compression lug?
A long barrel allows for multiple crimps, improving mechanical strength, reducing resistance, and increasing long-term reliability.
What stud size does this lug fit?
This compression lug fits a standard 1/2-inch stud or bolt.
Why is the lug tin plated?
Tin plating protects the copper from corrosion and oxidation while maintaining excellent electrical conductivity.
What does the blue color code indicate?
The blue color code identifies the lug as compatible with 400 MCM conductors for quick visual verification.
What crimping tool should be used?
Use a crimp tool rated for 400 MCM copper lugs and follow proper die selection, including Die Index I-76.
Is this lug suitable for outdoor installations?
Yes. The tin-plated copper finish provides corrosion resistance suitable for indoor and outdoor environments.
What voltage rating does this lug support?
This compression lug is rated up to 35 kV when installed correctly.
What is the maximum operating temperature?
This lug is rated for continuous operation up to 90°C.
Where are these lugs commonly used?
They are commonly used in power distribution systems, industrial equipment, renewable energy installations, and utility infrastructure.
4 Reasons Pros Buy Direct from Conversions Tech
, we design, test, and ship every product from inside the United States— “” quality without the big-box markup.
Our , mold, and QA station behind our weatherproof boxes, conduit bodies, and power inverters. , UL-listed safety, and up to 30 % lower cost than .
Need a torque spec or an OEM quote at dawn? You’ll speak directly with the Conversions Tech engineering desk—not a script reader—for instant answers, custom kitting, and private-label options.
Bottom line: For rugged, code-compliant electrical solutions shipped fast from a trusted U.S. source, choose Conversions Tech and build it right the first time.
