lightning

  1. L

    Lightning protection using ESE air terminal

    Hi, I'm designing a lightning protection system for a building 125m height using ESE air terminal. As I known, the French standard NFC 17-102 is applicable to the lightning protection using ESE lightning conductors of common structures of less than 60m high. What standard applicable to the...
  2. M

    800amp main switch

    hi,folks i need some help i have a 800amp main incomming over current switch with a bolt on earth leakage current relay,that seem to be tripping in bad weather ie when lightning is around,the site has 12 other sub boards none of which have the same device. my question is does anyone else think...
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