isolated grounding conductor

[infinity]

Do whatever you want. Isn't going to amount to a hill of beans.

-Hal

I agree, which I why I said that I would use a few as possible.

 

[Dale001289]

Do whatever you want. Isn't going to amount to a hill of beans.

-Hal

Agreed completely. But perception everything with this client. I could attempt to educate them but it would be futile.

 

[ActionDave]

How about if we take one IG per circuit (to several receptacles) along with one EGC per circuit for along the same route from the panelboard ground bus?

That would be fine.

 

[hbiss]

But perception everything with this client. I could attempt to educate them but it would be futile.

Just give them orange IG receptacles if that's what they want, collect your check and walk away. Nobodies saying otherwise.

-Hal

 

[Speedskater]

How about if we take one IG per circuit (to several receptacles) along with one EGC per circuit for along the same route from the panelboard ground bus?

Yes, you can run a EGC wire along the same route or just use the EMT.

 

[infinity]

Agreed completely. But perception everything with this client. I could attempt to educate them but it would be futile.

You should give them what they're paying for even if it's basically useless. And if they were to test the IG system you would want to install something that at least meets the code minimum. We've had jobs where they came in after the IG system was installed and tested every IG receptacle for proper grounding. Then they removed the IG conductor at the X0 of the transformer and tested every IG receptacle to ensure that it was indeed isolated.

 

[jim dungar]

You should give them what they're paying for even if it's basically useless. And if they were to test the IG system you would want to install something that at least meets the code minimum. We've had jobs where they came in after the IG system was installed and tested every IG receptacle for proper grounding. Then they removed the IG conductor at the X0 of the transformer and tested every IG receptacle to ensure that it was indeed isolated.

Did they provide specs/details on how what they considered the system would look like?

I would not like to be tested on something I was not told about.

 

[infinity]

Did they provide specs/details on how what they considered the system would look like?

I would not like to be tested on something I was not told about.

Yes we were given a design drawing and we were told that how they were going to test it (by removing the IG conductor). I think that this is actually from that job. The transformer fed a panel with an IG bus mounted on isolators.

This portion of the job was a mess because they ran regular 12-2 MC cable for the IG's with standard receptacles. First they changed the receptacles to IG devices but when retested that didn't work because the EGC's were physically connected to the homerun boxes. At the end when they did the pull the IG test it all passed because I had completely isolated all of those EGC's but it was not code compliant.

 

[Dale001289]

Just give them orange IG receptacles if that's what they want, collect your check and walk away. Nobodies saying otherwise.

-Hal

hahaha good advice.

 

[Dale001289]

Did they provide specs/details on how what they considered the system would look like?

I would not like to be tested on something I was not told about.

In our case, thus far No, they have not provided that info.