Has to do with Tolerance, Temperature, Duration, and Voltage…. Basically a 30 amp breaker will not trip at 30.00001 amps; more like 35 amps if exceeded for greater than 60 seconds, 40 amps if exceeded for more than 10 seconds, 50 maps if exceeded for more than 1 second… etc….
Jim & Kim from Colorado
2014 Eagle 30.5 RLS
2015 Dodge 3500HD SRW 6.7L
Click on my profile for Mods and notes