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1900s

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 current electric electrical flash flashover forces galvanized glazed insulate insulators leakage lines made old oppenheimer oval phone pole poles porcelain powerlines railway reduce retro rj45 shape steel telecommunications telegraph telephone then tracks transmission used vintage were wind wires withstand

Oppenheimer Telegraph Pole Vintage Stock Photography


Oppenheimer Telegraph Pole Vintage Stock Photo
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Oppenheimer Telegraph Pole Vintage #87479636
Description

An old telegraph pole used in the 1900`s during the construction of railway tracks. The poles were made of galvanized steel and are oval in shape to better withstand the wind forces on the wires and on the pole. Glazed porcelain insulators are then used to insulate the active lines and reduce the leakage of electric current.