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The 3M 7100027326 is a heat-shrink bus bar tubing designed to insulate and protect rectangular, square, and round bus bars in electrical distribution and power systems. Constructed from cross-linked, flame-retardant, track-resistant polyolefin, this tubing shrinks to conform tightly around the bus bar profile, creating a durable insulating sleeve. With an outside diameter recovery range of 6.67 to 10.86 inches, it accommodates a wide variety of bus bar sizes. Licensed electricians and electrical contractors working on switchgear, panel boards, and power distribution equipment are the primary installers.
This tubing is suited for commercial and industrial electrical applications where bus bar insulation is required. It is commonly installed in switchgear assemblies, motor control centers, and high-current distribution panels. The 50-foot case quantity makes it practical for larger projects or shops that perform regular bus bar work. Its flame-retardant formulation meets the demands of environments where fire resistance and long-term dielectric performance are priorities.
Designed as an OEM-style insulating sleeve for rectangular, square, or round bus bars in commercial and industrial electrical distribution assemblies.
Installation should be performed by a licensed electrician following applicable NEC requirements. De-energize and lock out the electrical system completely before handling or applying tubing to any bus bar. Apply uniform heat using an appropriate heat gun, working from one end to the other to prevent air pockets or uneven shrinkage. Do not use an open flame as a heat source, as this can damage the tubing and compromise its insulating properties.
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