Iwire...I fully agree with all you said about bondind onto the GEC...
But in jsherrard's 1st post he describes " a copper 2/0 GEC will run from the 4" water main to the grounding bus"..."then a 1/0 copper GEC will connect from the bus to neutral bar of each of the 400 amp panels"
This arrangement is not in concert with the requirement of 250.24(A)(1)...See exhibit 250.8 in the 2002 NEC for some other options for the GEC connection at a premises supplied AC service.
This requirement is also illustrated in the exsample that you have posted.
2005 250.64(C)(3) just adds the option of using a bus for interconnecting (bonding) all available electrodes.This bus may also be used to connect taps to other service equipment as allowed by 230.40 exception #2
shortcircuit
