13-02-2023, 03:41 PM
Nev
You don't use braid where it is the primary conduction method for lightning protection. The individual strands can fuse if/when a strike occurs.
Bonding sheets of metal roofing is ok but remember that with the overlapping roofing materials, even if electrically insulated at DC, create a fairly large capacitance which should appear as a low impedance at RF. Hence the bonding of large roof areas of sheets is mostly unnecessary to still be an effective RF "ground plane".
The material to use for lightning protection is heavy/wide copper strap, or aluminium etc..
Doug VK4ADC
You don't use braid where it is the primary conduction method for lightning protection. The individual strands can fuse if/when a strike occurs.
Bonding sheets of metal roofing is ok but remember that with the overlapping roofing materials, even if electrically insulated at DC, create a fairly large capacitance which should appear as a low impedance at RF. Hence the bonding of large roof areas of sheets is mostly unnecessary to still be an effective RF "ground plane".
The material to use for lightning protection is heavy/wide copper strap, or aluminium etc..
Doug VK4ADC
Doug VK4ADC @ QG62LG51
http://www.vk4adc.com
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http://www.vk4adc.com
This Forum is only going to be as interesting as the posts it contains.
If you have a comment or question, post it as it may trigger or answer the query in someone else's mind.