This means of interruption soon became inadequate and special devices called circuit breakers had to be developed. The basic problem has been to control and quench or extinguish the high power arc, ...
attach the grounding leads properly before touching any of the circuit breaker parts. d) Do no lay tools down on the equipment while working on it as they may be forgotten when the equipment is placed ...
The term digital in electronics represents the data generation, processing or storing in the form of two states.