Engineered Products Company’s 250 MCM / 500 MCM Bulk Thick Wall Heat Shrink Tubing is a heavy-duty, adhesive-lined solution designed for direct burial and large-gauge cable insulation. Manufactured from the same premium material as EPCO’s popular packaged HST Thick Wall Tubing, this product delivers superior protection for high-amperage conductors in commercial, industrial, and utility applications. 

This UL Listed (File #E123896) tubing meets the requirements of the 2026 National Electrical Code (NEC) Articles 110.14(B) and 300.5(C)(E) for proper dielectric insulation and secure underground installations. With a 3:1 shrink ratio, it provides a tight, moisture- and soil-resistant seal over splices and terminations, helping prevent corrosion and ensuring long-term performance. Available in custom cut lengths from 4" to 48", this bulk option allows contractors to order only the exact length needed for each job, reducing waste and controlling costs. 

Ordering Made Easy: Simply add the required cut length (in inches) to the end of the part number. Example: One (1) 13" piece of 250 MCM / 500 MCM tubing: E00-902-013. Note: All bulk tubing is quoted per inch for precise jobsite planning and cost control. 

BENEFITS 

• Direct Burial Approved & NEC 2023 Compliant – Safe for underground splices and terminations, meeting Articles 110.14(B) and 300.5(C)(E).
• Custom Cut-to-Length Ordering – Reduces jobsite waste and ensures cost-effective use by letting you order exactly what you need (4"–48").
• Labor & Time Savings – Easy-to-install tubing shrinks quickly for fast, secure terminations.
• Superior Protection – Provides a moisture-, soil-, and corrosion-resistant seal for long-term reliability.
• 3:1 Shrink Ratio – Covers a wide range of conductor sizes, reducing the number of tubing SKUs you need to stock.
• Durable for Harsh Environments – UV- and fungus-resistant, making it ideal for outdoor, underground, and heavy-duty applications.
• Cost-Effective Bulk Pricing – Sold per inch to give you precise control over material usage and project budget.
• Supports Large-Gauge Conductors – Designed for 250 MCM through 500 MCM power cables used in commercial, industrial, and utility systems. 

FEATURES 

• Bulk Custom Lengths – Available in 4" to 48" cut sections for precise jobsite use.
• Heavy-Duty Thick Wall Design – Same high-quality construction as EPCO’s packaged HST tubing for maximum durability.
• 3:1 Shrink Ratio – Provides a secure fit over a wide range of conductor sizes, reducing inventory requirements.
• Adhesive-Lined Interior – Creates a watertight, soil- and corrosion-resistant seal once heat is applied.
• Direct Burial Rated & UL Listed (File #E123896) – Ensures compliance with safety and performance standards.
• NEC 2026 Compliant – Meets Articles 110.14(B) and 300.5(C)(E) for dielectric insulation and underground protection.
• Black UV-Resistant Material – Maintains integrity in outdoor and exposed environments.
• Ideal for Large-Gauge Power Cables – Designed for 250 MCM to 500 MCM conductors in commercial, industrial, and utility systems. 

TYPICAL APPLICATIONS 

• Underground Power Distribution – Protects and seals large-gauge cable splices and terminations in direct burial installations.
• Commercial & Industrial Electrical Systems – Ideal for insulating 250 MCM to 500 MCM feeder cables in switchgear, panelboards, and junction boxes.
• Utility & Infrastructure Projects – Used in substations, vaults, transformers, and pole-mounted equipment for secure connections.
• Renewable Energy Systems – Provides long-lasting protection for high-current solar, wind, and battery storage terminations.
• Harsh Environment Installations – Designed to withstand moisture, UV exposure, and soil contaminants for outdoor and underground use.
• Heavy-Duty Equipment Connections – Ensures reliable insulation for large motor leads, pump systems, and parallel bonding conductors.