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Then why did you introduce them to the thread and why do you continue to talk about them. Westom's argument is that plug-in protectors are not well earthed so they can not possibly protect from surges (note the effect of inductance below). But plug-in protectors do not work primarily by...

Lie #1. My only association with the surge protection industry is I am using some surge protectors. Lie #2 I have posted specs often (like those below). So have others. A 10 year old could find specs. But westom always ignores the specs. Apparently westom knows plug-in protectors can not...

NFPA 780 or ANSI/NFPA 780 should be good but I doubt you can find it. http://www.e29.com.mx/pdf/greenbook.pdf is the IEEE "Green" book - "IEEE Recommended Practice for Grounding of Industrial and Commercial Power Systems", 1991. It has lightning protection information starting around page...

You could try: http://en.wikipedia.org/wiki/Lightning_protection Certainly not adequate to design a system but good information. Design uses a "rolling sphere" analysis. Another source that has miscellaneous information (some of which is linked to by Wikipedia): Structural Lightning...