A. Overhead high-potential power lines shall be (i) placed at least 15 feet above the ground and 20 feet above any driveway or haulage road, (ii) installed on insulators, and (iii) supported and guarded to prevent contact with other circuits. B. Surface transmission lines shall be protected against short circuits and lightning. C. Electric wiring […]
A. Unless a surface transformer is isolated by elevation to a height of eight feet or more above the ground, it shall be enclosed in a transformer house or surrounded by a suitable fence at least six feet high. If the enclosure or fence is made of metal, such enclosure or fence shall be grounded […]
A. Every metallic sheath, armor, or conduit enclosing a power conductor shall be electrically continuous throughout and shall be grounded effectively. B. Every metallic frame, casing, or other enclosure of stationary electric equipment that can become electrified through failure of insulation or by contact with energized parts shall be grounded effectively, or equivalent protection shall […]
A. An automatic circuit breaking device or fuse of the correct type and capacity shall be installed so as to protect each piece of electric equipment and power circuit against excessive overload. Wire or another conducting material shall not be used as a substitute for a properly designed fuse, and every circuit breaking device shall […]
A. Every trailing cable shall be provided with suitable short-circuit protection and a means of disconnecting power from the cable. B Any temporary splice in a trailing cable shall be made in a workmanlike manner and shall be mechanically strong and well-insulated. C. The number of temporary, unvulcanized splices in a trailing cable shall be […]
