Regarding the dangers of a lightning strike there is probably not a notable difference which pole material you chose. Also, the probability your house being struck by a direct hit won't be affected significantly with a 2.5m pole on the roof. BUT: If you already have any kind of external lightning strike protection installed, it is essential to connect it in a correct way to this existing protection.
Still, there are no guarantees. I had a Tempest mounted on my roof, on top of a 4m fiberglass/carbon composite mast, and a near strike damaged the humidity sensor last year. The strike was within a distance of 150 - 300m. Greg Troxel schrieb am Dienstag, 18. Januar 2022 um 14:25:57 UTC+1: > > Les Niles <[email protected]> writes: > > > What about using a fiberglass pole instead? The wires to the > > instruments could still potentially attract lightning, but probably > > wouldn’t carry enough current to start a fire — might blow out the > > This is incorrect thinking about lightning. Lightning is basically a > current source and that results in huge voltages and melted wires. > > > weather station electronics, but not burn down the house. Max-gain > > Systems <https://mgs4u.com/> sells fiberglass rods and tubes in > > various lengths and diameters. > > If you are in the US, see the National Electrical Code about > requirements for antennas. Yes, I know a weather station is not an > antenna, but a thing on a mast with a wire seems functionally > equivalent. > > Memory from last I looked is that the mast has to be grounded, perhaps > to a driven ground rod outside, and that ground has to be bonded to the > service entrance ground. And a lightning protector is required on the > wires entering the house (and the protector also needs to be grounded). > > If you aren't in the US, you should consult your local codes of course, > but the physics aren't any different. > > Some references: > > https://www.arrl.org/grounding-and-bonding-for-the-amateur > http://www.k9yc.com/GroundingAndAudio.pdf > https://www.kf7p.com/KF7P/Tech_Resources.html > -- You received this message because you are subscribed to the Google Groups "weewx-user" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/weewx-user/19545d36-c075-4533-8179-6ca13b377779n%40googlegroups.com.
