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Technology Stocks : The *NEW* Frank Coluccio Technology Forum -- Ignore unavailable to you. Want to Upgrade?

To: ftth who wrote (18754)	1/6/2007 2:48:46 AM
From: Frank A. Coluccio	Respond to of 46821

Yes, that was an interesting read, pretty much corroborating my earlier claim that lightning protection is (or at least was) just as much an art form as it is a science. The Cecil reference you pointed to was from 2001. I now find myself eager to learn what has been decided concerning NFPA-780 since that time, particularly with respect to the "proposed" NFPA-781 standard that would have made use of ESEs. Here's a photo of the ESE described in the Cecil doc from an outfit in Australia, Lightning Protection International Pty Ltd: --snip: lpi.com.au Stormaster ESE Air Terminal * offers a selection of models from within it's ESE range of terminals * All terminals have been tested to standard NFC 17-102 * Economical and easy to install OK, after a brief search I find that there is a 2004 edition of the standard available for $35.00. Good grief. code-electrical.com The technical changes that are highlighted in this "ad" say nothing about ESE, but do include the following: * A main conductor, solid strip, was added for Class II material requirements for ordinary structures exceeding 75 ft in height * Taller air terminals can be used to increase the spacing on flat or gently sloping roofs; * Handrails may be used as a substitute for down conductors * Additional separation between ground rods is required where multiple ground rods are used * Additional guidance is provided for those instances in which it is necessary to install the grounding conductor directly on bedrock; * The section entitled "Surge Suppression" was entirely rewritten; * Titanium strike termination devices may now be used * The section entitled "Faraday Cage" was replaced with "Metallic Cage" ------