Renovation of Existing Buildings

[blvengineers]

I have always been taught that when you do anything to an existing electrical service, you have to bring the whole system up to code. Can you verify what section of code requires this if any. I am dealing with an existing system that is grounded via rigid conduit to the successive subpanels. There are no wired grounds within the system except at the main service entrance. Can we leave this system in place or do i have to replace it all. There is a major renovation happening in this building.

 

[jumper]

Go look at post titled Question from PMer. Chris posted your question earlier

 

[Buck Parrish]

It's here
http://forums.mikeholt.com/showthread.php?t=110701&highlight=pmer

 

[charlie b]

And that makes this a duplicate. So I am closing this thread. Please reply in the other one.