Canadian Electrical Code Wire ID CAN

Hi,

I know someone who is an engineer, but not an electrical engineer, and is designing CANbus harnesses for mining vehicles.

He has this inexplicable system of naming wires. Suppose a conductor is spliced. Logically it's the same wire, it just branches in two, three, or four directions. What he will do is change the name/ID of the conductor in every direction.

I'm sure this is wrong. It's also unnecessary because the branches of the cable the conductors sit inside of each have their own names.

Is there a Canadian code rule that backs me up. Plenty of people have already discussed this, and I don't even want to complain unless I can offer something new to the discussion.