Safety rules for the installation and maintenance of electric utilization equipment: comprising part 3 and the grounding rules of the 5th ed., National electrical safety code. Supersedes H7 Issued January 23, 1940
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Rules covering methods of protective grounding
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administrative authority alternating-current American Standards Association amperes apparatus arcing arranged artificial grounds attachment-plug branch circuit buildings cabinets circuit switch circuits or equipment conduit Control Equipment cranes current-carrying direct-current disconnecting means ductors effectively grounded electric energy electric utilization equipment electrodes elevation feet fixtures floor ground connection grounded metal grounded neutral grounding conductor Grounding Frames Guarding Live handle Hazardous Locations hoistway inclosed inclosures inflammable flyings inflammable gas injury installed insulating material insulating mats isolated lamps lighting lightning arresters locations where explosives locked low-voltage machines marked for identification mats or platforms mechanical metal frames metal raceways motor National Electrical Code neutral conductor noncurrent-carrying metal Note opening operating panelboards Parts—Continued piping systems plug portable appliances portable cords protective grounding qualified persons readily receptacles rule 94 rules screw shell secondary service switch suitable insulating suitably guarded switchboards terminals third rail tion transformers ungrounded unless voltage volts to ground water piping water-piping system