Modern electrical construction; a reliable, practical guide for the beginner in electrical construction, showing the latest approved methods of installing work of all kinds according to the safety rules of the National board of fire underwriters (1905)
Horstmann, Henry C[harles], 1858- [from old catalog], Tousley, Victor Hugo, 1875- [from old catalog] joint author · Chicago, F. J. Drake & Co. · leaf 59
construction rules, see No. 6o.) a. Must be placed on a switchboard or, if not thereon,at a distance of at least a foot from combustible material, orseparated therefrom by a non-inflammable, non-absorptive,insulating material such as slate or marble. The attachments of the separating- material to… … 56 MODERN ELECTRICAL CONSTRUCTION. Ordinarily the dynamo field rheostat is mounted on theback of the board if the board is back connected, a small handwheel being provided so thatthe rheostat may be operatedfrom the front of the board.If the switchboard is in skele-ton form, or if the rheostat…
Electrical engineering
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
