Metallic water pipe GEC for 3 panels in house?

[MOELECTRIC]

I have installed 3 panels for a multi-unit/3 meterbox remodel house (public panel, 1st floor, 2nd floor) in Chicago. I am having trouble finding how I am supposed to provide a GEC to the waterpipe for each panel. I was told I cannot interconnect the panels and jumper a cable between them (I knew it was wrong but I took a shot). I am looking through the 2011 NEC and cannot figure out the wording for the situation I have encountered. Does anyone have a clear answer and/or point me to the proper code to look at?
Thank you,
MO

 

[augie47]

Am I assuming correctly that we have a service point with 3 individual meter bases and 3 service disconnects ?
If so you have a few options spelled out in 250.64(D) including connections at a central point ahead of the service disconnects, GECs from each disconnect to the electrodes or taps from each disconnect to a common GEC.
Of course, your POCO may have some requirements also.

 

[don_resqcapt19]

If you are actually in Chicago, then you need to look to the Chicago electrical code. They use their own version of the NEC and there are many differences.