3M 7000132521 Medium-wall Heat Shrink Cable Sleeve

Product Description

The 3M 7000132521 is a medium-wall heat shrinkable cable sleeve constructed from split-resistant cross-linked polyolefin. Sold as a 25 ft uncoated reel, this sleeve is designed to protect electrical conductors from mechanical damage, corrosion, abrasion, and chemical exposure. It fits conductor sizes from 1/0 to 250 kcmil and is engineered for fast shrink response with minimal tooling requirements, making field installation straightforward for electricians and cable splicers working on medium-voltage or industrial wiring systems.

This sleeve is suited for applications including bus bar insulation and phase rejacketing in commercial and industrial electrical installations. The 25 ft reel format is uncoated, meaning no factory-applied adhesive or sealant is present, distinguishing it from the 48-inch length versions. It offers greater flexibility compared to heavy-wall ITCSN series sleeves, making it a practical choice where conductor routing requires a more pliable protective jacket.

Key Features

• Cross-linked polyolefin construction resists splitting, abrasion, corrosion, and chemical exposure
• Fits conductor sizes 1/0 through 250 kcmil
• 25 ft reel format — uncoated, no factory-applied adhesive or sealant
• Fast-shrinking material reduces installation time with minimal training required
• Greater flexibility than heavy-wall ITCSN series for easier routing on complex runs
• Suitable for bus bar insulation and phase rejacketing applications

Compatibility

Designed for use on electrical conductors ranging from 1/0 to 250 kcmil. Typical applications include bus bar insulation and phase rejacketing in commercial and industrial electrical systems.

Installation Notes

Installation should be performed by a qualified electrician in accordance with applicable NEC requirements. De-energize and lock out the circuit before applying any heat shrink sleeve. Use an appropriate heat gun or torch to apply uniform heat, working from the center outward to avoid trapping air. Do not overheat the sleeve, as excessive heat can damage the polyolefin material or the underlying conductor insulation.

Technical Specifications

• Conductor Size Range: 1/0 to 250 kcmil
• Length per Reel: 25 ft
• Wall Type: Medium-wall
• Material: Cross-linked polyolefin
• Coating: Uncoated (no adhesive sealant)
• Weight: 3.3 pounds
• UPC: 00051135034859

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000132521