$15.00
The first attempts to insulate wire were made in the early 1800’s during the development of the telegraph. As a low voltage transmission wire on overhead poles, the problem was how to physically protect the conductors from the elements. Tarred hemp or cottom and shellac were the earliest insulation and jacket materials.
The first attempts to insulate wire were made in the early 1800’s during the development of the telegraph. As a low voltage transmission wire on overhead poles, the problem was how to physically protect the conductors from the elements. Tarred hemp or cottom and shellac were the earliest insulation and jacket materials.
| Author(s) | Charles A. Glew, Gary Chemical, USA |
|---|---|
| Publication/Event/Pages | Paper presented at WAI Nonferrous Division Meeting, Clearwater, FL USA |
| Year | 1989 |
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