T TMMB Senior Member Location EGYPT Occupation Electrical Manager Feb 26, 2012 #1 how can calculate the required down conductor nos. for a building for lighting protection system Please advise Regards
how can calculate the required down conductor nos. for a building for lighting protection system Please advise Regards
don_resqcapt19 Moderator Staff member Location Illinois Occupation retired electrician Feb 26, 2012 #2 The NEC does not cover lightning protection systems. You need to look at NFPA 780.
