A PTFE tubular busbar is a high-voltage power transmission device that uses a metal tube (typically copper or aluminum) as the conductor, PTFE-oriented film as the primary insulating medium, and a precision mechanical winding process to build a multi-layer shielding structure. Bus bars use many different types of adhesive-coated insulation materials to permit structure layers to be laminated together. There are added benefits from an electrical perspective. Insulation provides an inside and outside barrier to its installed environment. This document supersedes the following documents, all copies of which should be destroyed. Scope The scope of this. In electric power distribution, a busbar (also bus bar) is a metallic strip or bar, typically housed inside switchgear, panel boards, and busway enclosures for local high current power distribution, transmission, or switching substations.
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