The standard electrical dictionary; a popular dictionary of words, terms, and phrases, used in the practice of electrical engineering (1897)
Sloane, T. O'Conor (Thomas O'Conor), 1851-1940 · New York, H. W. Henley & co. · leaf 609
. Insulator, Floor. A tube of insu-lating material to give protection andadditional insulation to a conductor pass-ing through a floor. Insulator, Section. An insulatorfor maintaining the electrical separationof adjacent sections (see Trolley Section)of a trolley wire while permitting thetrolley to…
Electricity
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