How quickly does a GFCI typically open the circuit when it detects current leakage?

A Ground Fault Circuit Interrupter (GFCI) is designed to protect against electric shock by quickly detecting any imbalance between the incoming and outgoing current. When a GFCI senses that some of the current is leaking to the ground, it is programmed to react swiftly to isolate the circuit and prevent potential electric shock.

The correct time frame for a GFCI to open the circuit when it detects leakage is in the range of 2-3 hundredths of a second, which translates to approximately 20-30 milliseconds. This rapid response is crucial because it minimizes the duration of exposure to potentially harmful electrical currents, significantly reducing the risk of serious injury or death from electric shock.

The other options suggest response times that are either too slow to effectively provide adequate protection or inconsistent with the device’s operational specifications. For instance, options that suggest second-level responses would allow too much time for a human to be electrocuted, which is contrary to the purpose of a GFCI in enhanced safety.