Gotcha - a return path for amps - thanks!
I wondered about that but the reason I didn't figure it is that they do NOT EQUAL the individual or combined incoming amps being used on the two hot wires.
The amps I'm seeing on the neutral circuit seem to be a bit lower than the combined amps on the two phases coming into the circuit box.
I should mention that I have a basic ammeter and at it's lowest resolution of 30A (vs 150A) it really doesn't have markings below the 5A level and most of my measurements have been in the 0-5A range where I'm kinda guessing/rounding.
It also seems to have trouble registering amps on individual 12ga wires. So I'm taking the readings from the heavy guage wires coming in at the top of the box.
A 'typical' reading w/ an average load thruout the house of a few lights, PC, fridge or TV might look like this:
Phase 1: 1A
Phase 2: 5A
If I crank up a high draw appliance like an electric heater I might see:
Phase 1: 16A
Phase 2: 5A
Roger, those don't exactly line up w/ the diagrams you posted (thanks) but given my instruments resolution kinda/sorta come close on most average readings. Do you see a potential problem w/ readings like this?