01 The Problem
At a UMC fab, power cables thicker than a human arm run under the floor, carrying current to every tool. The cables look fine from the outside — there's nothing to see — but inside, the insulation slowly heat-cycles, screws on the cable lugs slowly back themselves out, and you can lose a phase before anyone notices. A cable burnout that takes down a fab costs more than $10 million per hour.
The Risk
Fab power cables operate under sustained high load; degradation isn't visible externally.
Detection Gap
A cable burnout = full fab shutdown — hourly losses easily exceed $10M.