lightning | Page 5

lightning

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  1. P

    Lightning rod directly over aerial cables

    I've got a question for anyone who knows anything about lightning strikes & conductor rods: I live in a four storey council block (around 100 flats in building) in London. Recently the council hired contractors to install around 20 lightning conductors from the roof down to the ground (it's a...
  2. J

    lightning strikes..

    afternoon all, might be a silly question but here goes, my house got hit by lightning in june which destroyed our phone, router, melted the copper in an aerial socket connection upstairs and turned the computer and tv screen green for a few days! what i wanna know is should this have...
  3. D

    Main Bonding to lightning conductors

    Hi all, New to this forum so I'll introduce myself as an electrician working for an NIC approved contractor in Sussex. Last week I did a PIR on a church and the only defect was a lack of main bonding to the lightning conductor. Bs 7671 lists this as a requirement but I cannot see why it is...
  4. T

    Lightning protection

    I am out in the desert with a lightning protection question that I am hoping someone can help me with. We try to adhere to 17th Edition rules and regs where possible. I haven't got my regs book with me so can't refer to that. I have a small installation that should be protected against...
  5. 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...
  6. 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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