Pole and Tower Lines: For Electric Power Transmission (Classic Reprint) - Couverture souple

Robert Duncan Coombs

Couverture souple

ISBN 10 : 1332736556 ISBN 13 : 9781332736553

Editeur : Forgotten Books, 2018

Synopsis

The digital edition of all books may be viewed on our website before purchase. Excerpt from Pole and Tower Lines: For Electric Power Transmission (Classic Reprint)



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A propos du livre

Présentation de l'éditeur

The rapid growth of the electric light and power industry within the last decade has caused an enormous increase in both the number and length of transmission and distribution lines. From a comparatively unimportant detail of little interest even to the owner the power lines have developed into quite pretentious systems whose relation to other industries and to the public must be taken into consideration. The occasional transmission systems designed for 11,000 volts and consisting of wood pole lines with spans of 120 ft. have developed into 150,000- volt lines on steel towers with spans from 500 to 800 ft. long, while the light wooden poles supporting a few street lighting circuits have been superseded in some cases by very heavy trunk lines of many cables. As is to be expected in a growing industry, no set of standards has been universally adopted. Moreover, it is impossible to apply any one specification or standard of construction universally, unless such a standard has some elasticity and is interpreted and enforced intelligently. In any attempt at standardization, either for one operating company or in a national specification, it is necessary to consider carefully the cost and the operating problems involved in the adoption of any general mechanical requirements. An apparently harmless requirement may become a very serious matter if applied to all future construction. The number, size and voltage of wires and the type of insulation to be used belong to the field of electrical engineering, while the subsequent determination of the best method of carrying the conductors across country is purely a question of civil engineering. The terms electrical and civil are used in their narrow sense, but the division is important as denoting the proper apportioning or departmentizing of the work. In this age of specialists there is no more reason for electrical engi
(Typographical errors above are due to OCR software and don't occur in the book.)

Détails de l'édition

• Éditeur: Forgotten Books
• Date d'édition: 2018
• Langue: anglais
• ISBN 10: 1332736556
• ISBN 13: 9781332736553
• Reliure: Broché
• Nombre de pages: 282
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