On Jan 23, 1:55*am, Bob Villa wrote:
Sometimes I work on equipment with 3-phase (delta). If you mix up the
wires...how do YOU figure out which wire goes where?
Thanks.

If you are talking about a motor, the only aspect to consider is the
motor direction. If the motor is running in the wrong direction,
reverse any two of the three phase wires.
The problem arises if mechanical damage can be caused by running the
motor the wrong way. in which case you will need to mechanically
disconnect the motor and run it to establish if it's running in the
correct direction.

If it's heating you're talking about, it doesn't matter