Copper Long Barrel One Hole Compression Lug 250 MCM 7/8-inch Bolt Size
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SKU: 210-09864
1000 in stock
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250 MCM Copper Long Barrel Compression Lug – 1-Hole, 7/8" Stud | Conversions Tech
The Conversions Tech Copper Long Barrel One-Hole Compression Lug is engineered for heavy-duty, high-current electrical applications. Designed to terminate 250 MCM copper conductors, this lug features a single 7/8-inch stud hole and a long barrel construction that delivers exceptional mechanical strength, low-resistance conductivity, and long-term reliability in demanding environments.
Manufactured from seamless electro-tin plated copper, this tinned copper compression lug provides superior corrosion resistance for industrial and commercial installations. The bright yellow color code enables quick visual identification and compatibility with standard color-coding systems—helping speed up installation while reducing errors.
Key Features
- 250 MCM Conductor Size: Precision fit for securely terminating 250 MCM copper cables in high-current systems.
- 7/8" Stud Size: Large single mounting hole ensures a stable, secure connection to bus bars and heavy equipment.
- High-Quality Copper Construction: Delivers excellent electrical conductivity and long-term durability.
- Long Barrel Design: Extended barrel supports multiple crimps for improved pull-out strength and consistent contact.
- Chamfered Barrel Entry: Guides stranded conductors smoothly into the barrel for faster, cleaner installs.
- Tin-Plated Finish: Enhances corrosion resistance while maintaining low electrical resistance.
- Bright Yellow Color Code: Enables easy identification and efficient installation.
- Heavy-Duty Performance: Built for industrial and commercial wiring in high-stress environments.
Common Applications
- Industrial power distribution and switchgear
- Commercial electrical panels and equipment
- Renewable energy systems and battery banks
- Utility infrastructure and heavy-duty grounding
- High-current terminations requiring large stud connections
Technical Specifications
| Material | Seamless Electro-Tin Plated Copper |
| Conductor Size | 250 MCM |
| Stud Size | 7/8 Inch |
| Pad Holes | 1 |
| Barrel Type | Long, with Chamfered Entry |
| Color Code | Yellow |
| Overall Length | 3.469 Inches |
| Barrel Length | 1.688 Inches |
| Pad Size | 1.25" L × 1.088" W × 0.157" Thick |
| Voltage Rating | 35 kV |
| Temperature Rating | 90°C |
Frequently Asked Questions (FAQs)
What wire type is this compression lug designed for?
This lug is designed for 250 MCM copper conductors. It is not intended for aluminum wire.
What is the benefit of a long barrel compression lug?
The long barrel allows for multiple crimps, improving mechanical strength, electrical contact, and long-term reliability.
What stud size does this lug fit?
This compression lug fits a 7/8-inch stud or bolt, commonly used in heavy-duty electrical equipment.
Why is the lug tin plated?
Tin plating protects against corrosion and oxidation while maintaining excellent conductivity.
What does the yellow color code indicate?
The yellow color code corresponds to 250 MCM conductors for quick visual identification.
Is this lug suitable for outdoor installations?
Yes. The tin-plated copper finish provides corrosion resistance suitable for indoor and outdoor environments.
What voltage is this lug rated for?
This lug is rated up to 35 kV when installed properly.
What is the maximum operating temperature?
This compression lug is rated for continuous operation up to 90°C.
What crimping tool should be used?
Use a crimp tool rated for 250 MCM copper lugs and follow manufacturer-recommended die selections.
Where is this lug commonly used?
It is commonly used in industrial power distribution, commercial electrical systems, renewable energy installations, and heavy-duty equipment.
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.
