grounding a separately derived system

[wyboy]

NEC 250.30(7) says a separately derived system must be grounded with a water pipe or metal building if available. If not available the electrode conductor must be ran to the nearest electrode which in this case would be the service. Is that correct? PART 2 of this question: At the service there is a ufer. If the rebar is tied together the length of the building can the rebar be used as a grounding electrode at the site of the transformer?

 

[Dennis Alwon]

NEC 250.30(7) says a separately derived system must be grounded with a water pipe or metal building if available. If not available the electrode conductor must be ran to the nearest electrode which in this case would be the service. Is that correct? PART 2 of this question: At the service there is a ufer. If the rebar is tied together the length of the building can the rebar be used as a grounding electrode at the site of the transformer?

You certainly may use the ufer that that serves the building for your GEC as well as the building steel and any water pipe electrode.

Here is an article on generators that was just published

 

[raider1]

If not available the electrode conductor must be ran to the nearest electrode which in this case would be the service. Is that correct?

Yes, that is correct.

At the service there is a ufer. If the rebar is tied together the length of the building can the rebar be used as a grounding electrode at the site of the transformer?

Yes, you can connect to the ufer ground at any point if it is accessible.

Chris