I come across this a lot when inspecting facilities. I find what appears to be unprotected wire, but then on the other end of the room, the wire feeds a smaller breaker/fuses which are correctly sized for overcurrent. Or mabye the motor these wire serve have internal thermal protection. I origianlly thought these wires are still unprotected because what if someone tapped off the wires between the breaker and fuses, thus increasing the load, they may have issues. But if these wires were ran undergroung, this could never happen. So my thought now is these wires serve one purpose only (a motor), and because there is proper overcurrent protection at the motor, there is no way those wires will ever see more than 100 amps. I am trying to confirm my thinking on this is correct? Or does a 25 ft tap rule apply?