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Section 6.3.4
Lightning Protection Photos
Below are photos, taken by NLSI in its consulting
and training work, that show various lightning protection mechanisms.
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| Correct application of SPDs to Cat. B Panels.
(Adams
County E911 Operations, Denver, Colorado) |
ESE air terminal works no better than ordinary Franklin rod (FR), despite techno-babble from vendor. ESE cost $1800; FR cost $2.40. (Mining company, Peru) |
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| Free-standing steel masts
are the preferred air terminal design for anexplosives facility.
(U.S. Army Weapons Depot, Hawthorne, Nevada) |
Redundant air terminal design showing both Franklin rods and tall
steel masts.
(U.S. Army Weapons Depot, Hawthorne, Nevada) |
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| Massive Faraday cage lightning
protection design to building under construction.
(Redstone Army Depot, Huntsville, Alabama) |
Early stages of corrosion to grounding electrode.
(Valero Refinery, Delaware City, Delaware) |
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| Defective bonding strap
shows poor maintenance.
(NASA, KSC, Florida) |
Steel beams are bonded at junctions.
(NASA Pad 39B, KSC, Florida) |
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| Secondary grounding to radio tower. Ufer ground plus remote earth shows best practice.
(U.S. Coast Guard, Ilwaco, Washington) |
U.S. Army munitions storage. (Bosnia) |
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| Pole-mounted siren and flashing light
indicate lightning "red alert." (Mining company, Peru) |
Avoid step voltage via equi-potentional metal mesh. (Metromont PreStress, LaVergne, TN) |
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| ESE air terminal is dysfunctional. (Cottonwood Operating Co. power plant, Orange, Texas) |
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| Good Shelters for Lightning Protection |
Poor Shelters for Lightning Protection |
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| Quasi-Faraday cage makes this guard shack safe from lightning. Law of unintended consequences? (hotel under construction, Singapore) |
Building for security guards offers zero safety from lightning. (Mining company, Peru) |
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| One-man small metal shelter is safe from lightning with addition of wire screening on all windows. (Mining company, Peru) |
Small wooden building not safe from lightning. (Metromont PreStress, LaVergne, TN) |
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| Portable lightning shelter that was made on-site serves same purpose as fully enclosed metal vehicle. (Mining company, Peru) |
(Mining company, Peru) |
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| Metal shipping container is very safe refuge from lightning. (Metromont PreStress, LaVergne, TN) |
(Mining company, Peru) |
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| (Mining company, Peru) |
(Mining company, Peru) |
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| (Mining company, Peru) |
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