Lightning Protection

[300TDI]

Anyone got any experience with lightning protection?

I have a customer who has had 2x chimneys installed in a large factory unit

The chimneys are 15 metres high (9 metres inside the building and 6 metres above roof)

They are 550mm diameter and the inside ( 9 metres ) is 6mm mild steel and the outside (6 metres) is 6mm stainless steel

At the base they are bolted to the concrete floor and the company that installed them have left a termination stud for earthing (with nothing attached)

The customer has raised the question do these just need earthing or should there be lightning protection in place

They have questioned the installer and they have said we just leave you with a connection stud, the rest is your problem ( pretty cruel been as the job was to install a complete high tech plant with must have cost a small fortune )

As i have now aquired the electrical business of the customer i will be looking after the site and could do with sorting this out.

( my next step on monday is to speak to furse who do a lot of this stuff to see if they can guide me )

Just wondered if anyone is clued up on this ???

 

[seajayess]

If they have lightning conductors fitted they will need bonding to the MET, always seem strange to me to import a lightning strike to the earth of the building but that is the regulation I suppose it keeps everything to the same potential CJS

 

[Evans Electric]

I was about to speak to Furse but you beat me to it. I also think its wierd to conduct the lightning strike into the electrical system but who are we to say. It was not done that way for years.

Deke

 

[m4tty]

check me out, i can help you

Go on then ....