Hawkins electrical guide. Questions, answers & illustrations; a progressive course of study for engineers, electricians, students and those desiring to acquire a working knowledge of electricity and its applications; a practical treatise (1914)
Hawkins, N. (Nehemiah), 1833- · New York, T. Audel · leaf 150
g. 985, and the screw joint type, fig. 986. Ques. What is the usual method of laying the socketjoint type of fibre conduit? Ans. After the trench has been dug to the required ^idthand depth, depending upon the number oa pipes to be placed ina tier and the number of tiers, a bed of concrete about 3… … mil Fig. 9S5.—Sleeve joint type of fibre. Both the socket type ifig. 984;, and the sleeve typehere shown are easily aligned without the use of a mandrel. it and from each other by means of 4 inch or 2 inch woodenor iron pegs. The pipes are well grouted and covered with alayer of concrete to the…
Electrical engineering
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