320 meter with 2-150 amp panels

[kwired]

The tap connection to the continuous grounding electrode conductor here is considered a grounding electrode conductor but has never been required to be an irreversible splice. Taps have always been done with split bolts here

The continuous run is the GEC, the item tapped off of it is a bonding jumper. Bonding jumpers can connect additional electrodes to the GES, you need one GEC to one of the grounding electrodes.

GEC to building steel - say it needs to be 2/0, you can split bolt a #4 to that 2/0 and connect the CEE (CEE never required to be larger then #4), or split bolt another 2/0 to hit a water pipe electrode, split bolt again to connect ground rod(s) if you desire them.

 

[david]

The continuous run is the GEC, the item tapped off of it is a bonding jumper. Bonding jumpers can connect additional electrodes to the GES, you need one GEC to one of the grounding electrodes.

GEC to building steel - say it needs to be 2/0, you can split bolt a #4 to that 2/0 and connect the CEE (CEE never required to be larger then #4), or split bolt another 2/0 to hit a water pipe electrode, split bolt again to connect ground rod(s) if you desire them.

never seen that done, i have seen grounding electrodes bonded together just never seen grounding electrodes bonded to the grounding electrode conductor as you stated