Associate Safety Professional Practice Exam

What is the typical time it takes for a GFCI to open the circuit when current leakage is detected?

1. 1-2 seconds

2. 2-3 hundredths of a second

3. 1-3 milliseconds

4. 1-2 minutes

The correct answer is: 2-3 hundredths of a second

The correct answer, which indicates a typical time of 2-3 hundredths of a second for a Ground Fault Circuit Interrupter (GFCI) to open the circuit when it detects current leakage, reflects the critical role of GFCIs in providing rapid electrical safety. GFCIs are designed to react quickly to protect against electric shock, particularly in situations where water is present, such as bathrooms or kitchens. By interrupting the electrical circuit within that short time frame, they reduce the risk of serious injury or fatality caused by electrical shocks. The very brief response time of a GFCI is essential for effective protection, as even a fraction of a second can make a significant difference in safety outcomes. This rapid operation allows for immediate disconnection of the circuit to prevent harm to individuals who may come into contact with electrical faults, illustrating the importance of using GFCIs in appropriate settings for electrical safety. In contrast, the other choices reflect significantly longer response times that would not provide the level of protection necessary to prevent electrical shock injuries effectively.