8. Add the distance of your answer to the position of the first mark and make the second mark. In this case, 6 inches plus another 6 inches places the second mark at 12 inches.
Breaking capacity or interrupting rating is the current that a fuse, circuit breaker, or other electrical apparatus is able to interrupt without being destroyed or causing an electric arc with unacceptable duration.reaking capacity current corresponds to a voltage, so an electrical apparatus may have more than one breaking capacity current, according to the voltage.
We can determine from Figure 2 or mathematical calculations that this system has an rms asymmetrical current of 90.5 kA and a peak asymmetrical current of 153 kA; however, these figures are not used in selecting the circuit breaker interrupting rating.