Which of these could be a source of an arc flash in the workplace? circuit breaker box, light switch, or an electrical outlet

Circuit Breaker Box is a source of an arc flash in the workplace

Explanation:

Due to carelessness and accidents arc flash happens. Faults or air gaps between the conductors through which electric current flows leads to arc flash. Impurities in the surface of conductors or rust can also cause arc flash.

Circuit breaker box is place where the electric supply from the company is taken by the panel and redistribute it throughout the workplace. If at any condition the electric wiring running in the home gets more current, circuit breakers cut the power and causes arc flash in case of short circuit.

the more fit you are, the faster the recovery. your heart rate drops most sharply in the first minute after you stop exercising; it should then fall about 20 beats a minute—a drop of less than 12 beats a minute is considered abnormal. this “recovery heart rate” is measured as part of an exercise stress test.