3M 7000138431 Hdcw Heat Shrink Cable Repair Sleeve

Product Description

The 3M 7000138431 is a wraparound heat shrink cable repair sleeve in the HDCW series, designed to restore insulation integrity on medium-voltage power cables. The sleeve ships in a flat, wraparound format that closes around the cable without requiring end access, making it practical for in-place repairs on installed runs. At 47.2 inches in length, it covers splice and damage zones on large-conductor cables ranging from 500 kcmil through 1000 kcmil. The expanded insulation diameter of 3.94 inches accommodates large cable assemblies before recovery, collapsing to a recovered insulation diameter of 0.91 inches for a tight, moisture-resistant bond. Licensed electricians and cable jointers working on medium-voltage distribution systems are the primary installers.

This sleeve is suited for medium-voltage cable repair and splice protection on conductor sizes including 500, 600, 650, 700, 750, 800, 900, and 1000 kcmil. Typical applications include utility distribution, industrial plant feeders, and commercial building medium-voltage runs where insulation has been mechanically damaged or where a splice requires re-jacketing. The multi-voltage rating of 8/35/25/28/1/15 kVAC covers a range of medium-voltage system configurations. The wraparound design is especially useful on cables routed through conduit or cable trays where pulling a sleeve over a cable end is not feasible.

Key Features

• Wraparound construction allows installation without end access to the cable
• 47.2-inch length provides generous coverage over splice zones and damaged insulation sections
• Accepts conductor sizes from 500 kcmil through 1000 kcmil
• Expanded insulation diameter of 3.94 inches for easy placement over large cable assemblies
• Recovers to 0.91-inch insulation diameter for a firm, sealed fit
• Multi-voltage rating of 8/35/25/28/1/15 kVAC supports multiple medium-voltage system configurations

Compatibility

Designed for use on medium-voltage power cables with conductor sizes of 500, 600, 650, 700, 750, 800, 900, and 1000 kcmil, with system voltage ratings of 8/35/25/28/1/15 kVAC.

Installation Notes

Installation must be performed by qualified electricians trained in medium-voltage cable work; de-energize and verify absence of voltage per NFPA 70E safe work practices before beginning any cable repair. The wraparound sleeve is positioned over the repair zone and closed before applying heat evenly with a propane or butane torch working from the center outward to avoid trapping air. Follow applicable NEC requirements and the cable manufacturer's splice procedures for shielding continuity and jacket integrity. Do not overheat any single area, and allow the sleeve to cool fully before re-energizing or backfilling.

Technical Specifications

• Series: HDCW
• Type: Heat Shrink Splice Wraparound
• Length: 47.2 inches
• Conductor Size: 500, 600, 650, 700, 750, 800, 900, and 1000 kcmil
• Expanded Insulation Diameter: 3.94 inches
• Recovered Insulation Diameter: 0.91 inches
• Voltage Rating: 8/35/25/28/1/15 kVAC

Standard Information

• Brand: 3M
• Manufacturer Part Number: 7000138431