3M 7100004701 Electrical Tape 3 in 20 Ft Black Series 77

Product Description

The 3M 7100004701 is a heavy-duty electrical tape from the Series 77 line, designed for professional insulating applications in electrical work. Measuring 3 inches wide and 20 feet long with a 30 mil thickness, this tape delivers a substantial build in a single wrap, making it well suited for bundling, insulating, and protecting conductors and splices. The rubber-based adhesive provides reliable bonding across a range of surfaces encountered in field and panel work. Licensed electricians and electrical contractors will find this roll practical wherever a wide-format insulating tape is needed on the job.

This tape is intended for insulating applications in residential and commercial electrical installations. Its 3-inch width makes it an efficient choice for covering larger splices, wrapping conduit transitions, or insulating connection points that would require multiple passes with a standard 3/4-inch roll. The 30 mil thickness adds mechanical protection where wiring is exposed to physical contact or abrasion. It is appropriate for use by licensed electricians performing panel work, service entrance work, or general wiring tasks.

Key Features

• 30 mil thickness provides heavy insulation buildup in fewer wraps
• 3-inch width covers large splices and terminations efficiently
• Rubber adhesive bonds firmly to conductor insulation and common electrical substrates
• Series 77 formulation rated for insulating service
• 20-foot roll length suitable for multiple job applications per roll

Compatibility

Designed as a general-purpose insulating electrical tape suitable for use in standard electrical insulating and bundling applications where a wide-format, heavy-gauge tape is specified.

Installation Notes

Installation should be performed by a licensed electrician following applicable NEC requirements. De-energize and verify circuits are at zero voltage before applying tape to any conductor or splice. Apply with consistent tension to ensure full adhesive contact and avoid air gaps at overlap edges. Do not use as a substitute for listed wire connectors or heat-shrink insulation where those methods are code-required.