Lightning resistance

[Pingpong]

Has any one ever heard if testing a lighting conductor impedance by disconnecting the rod from the down conductor and testing between the 2 open ends.

 

[binky]

Has any one ever heard if testing a lighting conductor impedance by disconnecting the rod from the down conductor and testing between the 2 open ends.

Why do you ask? Lightning conductors is a specialist subject, but to test impedence of the rod, it makes sense to me to disconnect it.

 

[Pingpong]

Yes disconect. The rod. But to then just test disconnected rod to bonding tap does not give you a impedance of the rod.

 

[binky]

Yes disconect. The rod. But to then just test disconnected rod to bonding tap does not give you a impedance of the rod.

Bonding to MET?

 

[UNG]

Why do you ask? Lightning conductors is a specialist subject, but to test impedence of the rod, it makes sense to me to disconnect it.

Shouldn't installing a TT rod be a specialist subject then as many of them are badly installed

With regard to the specialist subject of lightning conductors some of the testing and installation of additional rods I have seen recently certainly didn't comply with any of the regs or standards on the subject and this work was carried out by so called specialists

As an electrician I was involved with lightning protection work 40 odd years ago back then it was all considered to be normal work for an electrician