Safety Rules for the Installation and Maintenance of Electric Supply and Communication Lines: Comprising Part 2 and the Grounding Rules of the Fifth Edition, National Electrical Safety Code. Supersedes, Volume 10
U.S. Government Printing Office, 1941 - Electric engineering - 177 pages
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Rules covering methods of protective grounding of over
Scope nature and application of rules
15 other sections not shown
adjacent apply buckarm carried climbing space communication cables communication circuits communication conductors communication lines conduc conductor fastenings conductor Material Conductors on Pole conductors supported conflict contact conductors copper crossarms crossing span current-carrying ductors ducts effectively grounded electric equipment exceed Exception Feet Feet given in table grade of construction ground connections ground wires grounding conductor guarded horizontal installed jointly used poles lateral conductors lightning arresters line conductors loading district located longitudinal strength manholes material means messen messenger metal metal-sheathed operation of supply overhead pins piping Pole Lines poles or towers practicable protection railroad required by rule Separation Between Conductors sheath span length span wires specified in rule specified in table steel strain insulator suitable supply cables supply circuits supply conductors supply lines supporting structures tion tracks transverse load trolley pole trolley-contact conductors ultimate strength unloaded sag Vertical Separation volts between conductors volts to ground withstand wood poles