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Preface n Definitions
Rules covering methods of protective grounding of circuits and station equipment
Point of attachment of grounding conductor
22 other sections not shown
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accessible accordance with rule alternating-current amperes apparatus appliances apply Arcing artificial grounds automatic circuit-breakers battery rooms building cable cells circuits or equipment clearances compartment conduit devices direct-current disconnectors electric energy electric supply equipment electrodes electrolyte enclosed enclosures excessive feet frames fuses or automatic ground connection ground detectors ground wire grounding conductor Grounding Frames guard zone Guarding Live Hazardous Locations highest effective voltage illumination inches induction regulators inflammable gas injury installed instrument transformers insulating covering isolated by elevation knife switches less liable lightning arresters liquid low-voltage means the highest mechanical metal raceways modified or waived Motor-generators motors nonsealed type Oil Switches operating outdoor Passageways permanently grounded persons piping systems portable protective grounding readily Required—Continued resistance Rheostats secondary circuits short-circuit similar equipment space SPARK GAP specified suitable insulating surface switchboards tion Toe Boards ungrounded unless volts between conductors volts to ground water meter water piping water-piping system