 | United States - 1983 - 1156 pages
...circuits enter the underground portion of the mine, disconnecting devices shall be installed and so equipped or designed in such a manner that it can be determined by visual observation that the power is disconnected, except that the Secretary or his authorized representative may permit such devices... | |
 | 1995 - 758 pages
...boom or mast shall be as follows: §77.807-3 Movement of equipment; minimum distance from nigh-voltage lines. When any part of any equipment operated on...circuit is deenergized when such devices are open. S 77.809 Identification of circuit breakers and disconnecting switches. Circuit breakers and disconnecting... | |
 | 1997 - 736 pages
...booms and masts, such power-lines shall be deenergized or other precautions shall be taken. 477.808 Disconnecting devices. Disconnecting devices shall...circuit is deenergized when such devices are open. S 77.809 Identification of circuit breakers and disconnecting switches. Circuit breakers and disconnecting... | |
 | 1994 - 772 pages
...powerlines shall be deenergized or other precautions shall be taken. 577.808 Disconnecting device«. Disconnecting devices shall be Installed at the beginning...circuit is deenergized when such devices are open. 577.809 Identification of circuit breaken and disconnecting «witches. Circuit breakers and disconnecting... | |
 | 1998 - 740 pages
...Minimum distara (IM() 69 to 1 14 115 to 229 230 to 344 „ _ _... 345 to 499 _ 12 15 20 25 35 §77.901 Í 77.808 Disconnecting devices. Disconnecting: devices...designed in such a manner that It can be determined by risual observation that the circuit is deenergized when such devices are open. 1 77.809 Identification... | |
 | 1992 - 808 pages
...Disconnecting devices shall be installed at the beginning of branch lines in high-voltage circuits and equipped or designed in such a manner that it can...determined by visual observation that the circuit is deener gized when the switches are open. §75.809 Identification of circuit breakers and disconnecting... | |
 | 1987 - 758 pages
...circuits enter the underground portion of the mine, disconnecting devices shall be installed and so equipped or designed in such a manner that it can be determined by visual observation that the power is disconnected, except that the Secretary or his authorized representative may permit such devices... | |
 | 1994 - 786 pages
...boxes shall be provided with a disconnecting device for each branch circuit. Such disconnecting devices shall be equipped or designed in such a manner that it can be determined by visual observation when such a device is open and that the circuit is deenergized, and the distribution box shall be labeled... | |
 | 1998 - 740 pages
...shall be provided with a disconnecting device for each branch circuit. Such disconnecting de-vices shall be equipped or designed in such a manner that it can be deter-mined by visual observation when such a device is open and that the circuit is deenergized, the distribution box shall be labeled... | |
 | United States. Congress. House. Education and Labor - 1969 - 688 pages
...used to disconnect power from trailing cables shall be plainly marked and identified and such devices shall be equipped or designed in such a manner that...it can be determined by visual observation that the power is disconnected. (c) When two or more trailing cables junction to the same distribtuion center,... | |
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... 77.808 Disconnecting devices. Disconnecting devices shall be installed at the beginning of each branch line in high-voltage circuits and they shall be equipped or designed in such a manner that it can be determined by visual observation that the circuit... 
