Canadian Pacific Railway installing copper wires; tests glass and porcelain insulators
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[Trade Journal] Publication: American Electrician New York, NY, United States |
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Among our Foreign Contemporaries. Edited by CHARLES T. CHILD. · · A Long Land Line. — The Canadian Pacific Railway Company is now building a land line of copper wire from Montreal to Vancouver, which will contain, when completed, no less than 2900 miles of copper wire. Some interesting practical tests on insulators for this line have been going on recently at McGill University, and are described in the "Canadian" Engineer." The tests are for the resistance to fracture of various types of glass and porcelain insulators, the result being that the porcelain resisted much heavier and more blows than the glass. With a 32-calibre revolver fired from a distance of 8 ft. the glass insulators flew to pieces at nearly every shot, while the porcelain frequently showed no mark except a blackening from the lead of the bullet; when they did break it was generally in such a way that, had they been attached to the pole, the wire would not have fallen. The wire used on this line weighs 300 pounds per mile, and shows a conductivity of 97 per cent. · ·
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