A cable rated for 100A at 30°C might only be safe for 70A if the room is consistently 50°C. 2. Grouping or Bundling ( Kgroupcap K sub g r o u p end-sub
In this scenario, a cable you thought could handle 100A is actually only safe for about 61A. Why This Matters for Design derating factor of cable
In a perfect world, a cable would carry its maximum rated current indefinitely without breaking a sweat. In the real world, physics—specifically heat—gets in the way. A cable rated for 100A at 30°C might