The Breakroom > The Water Cooler
Safety of Polyuerathane Insulation?
<< < (3/4) > >>
Joules:
It's not so much it reduces the effectiveness, that any sharp bends try to straighten them selves out during a strike, ripping out the fasteners or the masonry they are connected too, with explosive force.  The rod needs to be as straight as possible all the way to the ground.
awemawson:
Pete, if that company is anything to do with Colin Furze there'll be sparks all over the place  :bugeye:

http://www.colinfurze.com/
efrench:
Isn't a stone house already earthed?
howsitwork?:
few years back one of the neighbours had a direct hit on the roof. It earthed out through the radiators and blew the tank up but no one hurt.

Re Kingspan it willfly across the metalfoil possibly but the makers will advise.

A decent tall metal pole with a  substantial lead to the ground will attract lightening to it.

Will_D:
IIRC a lightning conductor is NOT designed to conduct a lightning strike to ground!

The way lightning discharges work is by a positive charge builds up on high points like chimneys. The clouds provide the negative charge. Once the potential difference (of a high spot) exceeds the ionisation potential of the atmosphere then Flash / Bang.

So how does the conductor work?

The charge builds up at the pointed conductor and is then conducted to ground so that the positive charge on your chimney is reduced to a safe level and the cloud then has to look for another large build up of positive charge.

As I said IIRC!! Not sure if a 25 x 3 mm copper strip can handle a strike!!
Navigation
Message Index
Next page
Previous page

Go to full version