Don
There are 3 meters in a 3-meter base set-up and 3 separate service conductor cables and 3 service panels,.. for example, think of the panels as (3 2 1) no.3 goes to the ground rods, and as is the case for service panels the neutral is bonded to the grounding conductor, from no.3 to no.2 a jumper is run to its neutral buss, it too is bonded, from no.2 to no. 1 a jumper is run to its neutral buss and it to is bonded.
Yes the current will divide as per the ratio of the resistance of the neutral and the no.4 copper bonding jumper. in this case the no.4 copper copper will have less resistance than the no.4 grounded Neutral conductor of the service.
Now if you put a clamp-on on the jumper from 1 to 2 you will read a good deal of current and from 2 to 3 good current reading. but when you put the clamp on on the no.4 cndtr from no.3 to the ground rods the needle will barely move, why because the current at no. 3 is returning on panel no.3's neutral and the 25 ohms to ground is much larger than the resistance of panel no.3 aluminum neutral.
I hope I writing this clear enough I know what I am seeing but whether I am describing it correctly could well be another.
Yes on panels 1 and 2 its about evenly divided. All I am saying is that those first two panels are dividing their unbalanced current and sharing it with the bonding jumper and does that until it reaches the panel that is tied to the ground rods.
-Mark.
