Title :
National and state electrical requirements for a-c mining
Author_Institution :
Bureau of Mines, United States Department of Interior, Pittsburgh, Pa.
Abstract :
A discussion of the lack of uniformity of state mining laws which have hampered operations of interstate coal-mining companies. This situation has been aggravated by the trend toward wider use of a-c mining equipment against which some state laws are particularly restrictive.
Keywords :
Cable insulation; Cable shielding; Coal mining; Flame retardants; Fuses; Oil insulation; Power transformer insulation;
Journal_Title :
Electrical Engineering
DOI :
10.1109/EE.1958.6445379
