Lightning-arrester grounds on trolley tracks shall be connected to earth at least 25 feet from the underground mine opening.
4 Va. Admin. Code § 25-40-2390
Statutory Authority
§§ 45.1-161.3, 45.1-161.294 and 45.1-161.305 of the Code of Virginia.
Lightning-arrester grounds on trolley tracks shall be connected to earth at least 25 feet from the underground mine opening.
4 Va. Admin. Code § 25-40-2390
Statutory Authority
§§ 45.1-161.3, 45.1-161.294 and 45.1-161.305 of the Code of Virginia.