On Oct 9, 3:19 pm, mm wrote:

Lighning rods don't conduct the lightning to ground. They are so thin
they'd melt. IIRC they conduct to ground the negagive charge that
would build up at the top of the house, and the lightning isn't
attracted to the house anymore. Something like that.

That's a common misconception, based on the average 30,000 amp
estimate of a lightning strike and trying to figure wire size.

But it's not a steady state current. It's a sharply dampled sinusoid,
and #10 wire is more than adequate for any expected strike. Here in
Europe everybody uses 3/8 inch solid rod (or metric equivalent) but it
is no more protective.