Isolated Ground Receptacle

[ed downey]

I Have A Building Where The Owner Hired The Modular Furniture Installers. They Have Installed Isolated Ground Type Receptacles In Each Cubicle. The Only Problem Is We Do Not Have An Isolated Ground System In This Existing Building.
Does This Violate 250-146(d) {1999 NEC}?

I Believe They Tied The IG Conductor To The EGC And Then Ran Back To The Ground Buss In The 120/208V Panelboard.

Thanks For Your Input.
-Ed

 

[tom baker]

Re: Isolated Ground Receptacle

No the bonding connection for the IG receptacles can be done anywhere from the receptacle to the source.
And an IG receptacle is not very effective and most will say not worth the money.

 

[shocker3218]

Re: Isolated Ground Receptacle

IG's are a total waste of money in my opinion. I base this on some factory experience (Square D company factory)

They had computers everywhere you turned. Every machine had a PLC, every desk had a desktop, and several portable and laptop computers. (Not to mention vision systems, data logging computers, test computers, etc)

Machines were linked together via ethernet connection, which was tied to the local area network, which was tied to the wide are network, etc, etc, etc. My message being, it was computer heaven.

The power to the factory came in at 4160 volts, stepped down to a 480 distrubution system, with 120/208 volt panelboards and transformers installed as required. These panels fed through gutters and when you needed a drop, you simply punced a hole for the emt in the gutter and made the drop. A grount tail in the box was commonly used (no equipment ground conductor in the conduit)

In the 6 years I was there, we never burnt up a power supply, and we had very few data glitches.

Sorry, a little off subject, but I hope you get the meaning.