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A. The Director shall promulgate regulations requiring the installation of disconnecting switches underground in all main power circuits at appropriate locations. B. Until the final regulations promulgated by the Director pursuant to subsection A become effective, disconnecting switches shall be installed underground (i) in all main power circuits within approximately 500 feet of the bottoms of shafts and boreholes, and (ii) at other places where main power circuits enter the mine. Code 1950, § 45-82.3; 1954, c. 191; 1966, c. 594, § 45.1-80; 1994, c. 28 .
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