Incoming services becoming live?

[boss]

hey guys, nice forum by the way. This is my 2nd post I think but any way here goes.

In what circumstances have you dealt with or heard about (stories etc) have you found the incoming services to be live, such as gas pipes, water pipes? whats the possiblities.....

cheers

 

[Bane]

Endless...

 

[rumrunner]

Hi
The incoming service are often live ,not sure quite what your asking ,if they wernt then it would all be a bit of a waste of time,.

have i missunderstood yer question?

 

[boss]

sorry, i've changed it, re read please

 

[Grae79]

lol....think he must mean gas/oil/water

 

[boss]

yea....

 

[rumrunner]

hi
got it now ,no ive never come accross it ,is it possable?

 

[boss]

if it wasnt possible, then why should we bond them ?

 

[alex]

its so under a fault conditions your main earthing conductor fails its a secondary protection method to earth to ensure disconnection of supply.

 

[Shakey]

if it wasnt possible, then why should we bond them ?

because you are creating an equipotential zone

 

[solo2771]

Hi all, If the bonding was not earthed to the main earthing point and there was a phase to earth leakage wouldn't that make the pipes, rads etc have a pd from the earth?
Paul

 

[rumrunner]

hi,
Only for a very short space of time, all service pipes are at earth potential ,so it would be a dead short.

 

[solo2771]

Surely if there is no earth path fr the current to take there will be a voltage in the bonding ie rads and pipes? or am I missing something?
paul