Per 2014 NEC Article 100, short circuit current rating (SCCR) is defined as: “The prospective symmetrical fault current at a nominal voltage to which an apparatus or system is able to be connected ...

Fill in the blank. An industrial control panel shall not be installed where the available short-circuit current exceeds the _____ of the industrial control panel in accordance with Sec. 409.110(4). As ...

All questions and answers are based on the 2011 NEC. Q. What is the Code requirement for the interrupting protection rating of overcurrent devices? A. Overcurrent devices, such as circuit breakers and ...

Often, little things make a big difference in a successful design. When it comes to telecommunications equipment, the incorrect specification of a circuit breaker can lead to unnecessary system ...

This circuit is suitable in every situation where over-current protection is required. Here we give an example from the model train world. Every seasoned model train enthusiast knows that there is ...