NAVFAC MIL-HDBK-1004/6 Lightning Protection

Page4.4.7 Exterior Overhead Pipelines . . . . . . . . . . . . .144.4.8 Fences . . . . . . . . . . . . . . . . . . . . . . .144.5 Generating Plants . . . . . . . . . . . . . . . . . .144.5.1 Surge Protection . . . . . . . . . . . . . . . . . .144.5.2 Grounding . . . . . . . . . . . . . . . . . . . . . .154.6 Outdoor Substations or Switching Stations . . . . . .154.6.1 Air Terminals . . . . . . . . . . . . . . . . . . . .154.6.2 Grounded Aerial Conductors . . . . . . . . . . . . .154.6.3 Grounding . . . . . . . . . . . . . . . . . . . . . .154.7 Transmission and Distribution Lines . . . . . . . . .154.7.1 Distribution Line Clearances . . . . . . . . . . . .154.7.2 Transmission Line Clearances . . . . . . . . . . . .154.7.3 Clearance Calculation . . . . . . . . . . . . . . . .164.8 Flagpoles and Chimneys . . . . . . . . . . . . . . .164.9 Towers and Antennas . . . . . . . . . . . . . . . . .164.10 Aircraft and Aircraft Hangars . . . . . . . . . . . .164.11 Ordinary Buildings . . . . . . . . . . . . . . . . .164.12 Obstruction Lights . . . . . . . . . . . . . . . . .16APPENDICESAPPENDIX AAPPENDIX BPrimary Lightning Protection for Ordnance HandlingFacilities . . . . . . . . . . . . . . . . . . . .17International System of Units (SI) ConversionFactors . . . . . . . . . . . . . . . . . . . . . .37FIGURES1 Primary Lightning Protection System . . . . . . . . . . . . . .32 Lightning Mast Ground Connection Details . . . . . . . . . . .43 Secondary Lightning Protection or Grounding System . . . . . .54 Bonding and Grounding of Railroad Track . . . . . . . . . . . .65 Concrete and Steel Ground Connections for Secondary System. . .76 Other Grounding Details for Secondary System . . . . . . . . .87 Other Grounding Details . . . . . . . . . . . . . . . . . . . .9BIBLIOGRAPHY . . . . . . . . . . . . . . . . . . . . . . . . . . .40REFERENCES . . . . . . . . . . . . . . . . . . . . . . . . . . .41