jbartos,
You are correct. Unfortunately, several of the higher voltage installations that I have seen have the concentric neutral passing through the window of the 600 volt CT in only one direction. Apparently some forget that it (concentric neutral) can, and many times does, carry current!
My comments were only to emphasize the point.
A similar situation occurs when the metering potential connection is made after the metering CTs, especially in pad mount transformers. For convenience, the termination is often done on the load side of the CTs, but, the conductor must be passed backwards through the CT to cancel out the metering potential current needed to power the metering equipment. Failing to do so renders the installation technically illegal in most U.S. jurisdictions. I am aware of one large energy theft case that was thrown out of court because of this condition! The judge ruled that the installation was technically illegal.
Greg May
Two Sockets - Two Meters, Inc.
WEB: socket-two-me.com