Our Voltimum Experts answer your questions on a daily basis in our Technical Expertise area. This Question of the Day, about how to test for lighting protection, is answered by Kew Technik (Socket & See):
I drove in one earth rod and tested it, and achieved a reading of 268 ohms. What is the calculation I need to use to find out how many rods that I need to install? Note that the ground is very peaty.
Answer: The short answer is that we can advise how to test, but I think you know that already. BS 6651:Code of practice for protection of structures against lightning will be useful. Also visit www.furse.com for much more information on lightning protection products and services.
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