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 g) Appendix A, A-12 and A-13 illustrate primary lightning
protection by overhead ground cables for railroad and truck marshalling yards,
railroad siding and detail of overhead ground wire supporting poles and
counterpoise. Piers and wharves should be protected by meeting requirements
stated in paras. 1 and 3, Appendix A.
h) To check the adequacy of the zone-of-protection when the height
of supporting towers or poles is determined, draw sketches to scale as shown
in Appendix A, A-12 and A-13. The effective height of the overhead ground
cable shall be maintained between the low point of the sag and the protected
facility.
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