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Surface High-voltage Distribution

Surface High-voltage Distribution

208.241High-voltage circuits; circuit breakers.208.242Testing, examination and maintenance of circuit breakers; procedures.208.243Testing, examination and maintenance of circuit breakers; record.208.244Grounding resistors.208.245Grounding resistors; continuous current rating.208.246Protection of high-voltage circuits; neutral grounding resistors; disconnecting devices.208.247Fail safe ground check circuits on high-voltage resistance grounded systems.208.248Fail safe ground check circuits; maximum voltage.208.249Ground check systems not employing pilot check wires; approval by the Secretary of the United States Department of Labor.208.250High-voltage trailing cables; minimum design requirements.208.251Cable couplers and connection boxes; minimum design requirements.208.252Connection of single-phase loads.208.253Installation of high-voltage transmission cables.208.254High-voltage powerlines; clearances above ground.208.255Booms and masts; minimum distance from high-voltage lines.208.256Movement of equipment; minimum distance from high-voltage lines.208.257Disconnecting devices.208.258Identification of circuit breakers and disconnecting switches.208.259High-voltage equipment; grounding.208.260Movement of portable substations and transformers.