The meter doesn’t measure current on the grounded conductor, only the current on the ungrounded conductors. Go back and look at the distribution diagram I drew and ask youeself, where does all the combined voltage drop on the neutral go?
I am working on the distribution for the whole 3 streets the single 13.5kv lead feeds. I bet it will be an eye opener when I add in the voltage drop on the 2ga al neutral on the FPL side.
I bet you can open your eyes on your street too when you add up all the voltage drops.
While we are waiting for me to map out my notes, tell us what is on your GEC? You got a clamp on?