Identifier: americantelepho00mill (find matches)
Title: American telephone practice
Year: 1905 (1900s)
Authors: Miller, Kempster B. (from old catalog)
Subjects:
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Contributing Library: The Library of Congress
Digitizing Sponsor: The Library of Congress

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swaxed or paraffinedjumper wires were used, and where the distributing frame was builtlargely of wood, wras a very serious drawback. Now, however, itis of less importance, because the use of flameproof jumper wire andstructural iron frameworks has rendered the liability to damage byfire in the distributing frame itself very slight. This brings us logically to still another method of constructionwhich in some circles is growing in favor. In this pot-heads orsome equivalents are used for protecting the outside cable insula-tion, and the cables from these are terminated in arresters on a sepa-rate arrester*frame. In this case the arresters are mounted on ironbars and are entirely open, as when mounted on the distributingframe. From the arresters the cables then lead to the line side ofthe distributing frame. The switch-board side of the distributingframe in this case consists only of ordinary clips for connecting thecables leading to the intermediate and relay racks and the switch-board.
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