Final answer:
GFCI breakers are primarily used for a. circuits in wet locations such as bathrooms, where they protect against electrical shock by detecting and interrupting leakage currents.
Step-by-step explanation:
GFCI breakers are typically used for what types of circuits? The correct answer is: a. circuits in wet locations such as bathrooms. A ground fault circuit interrupter (GFCI) is designed to protect against electrical shock by interrupting a household circuit when there is a difference in the currents in the hot and neutral wires. Such differences can occur when electrical current finds an unintended path, possibly through a person, which can be hazardous. GFCIs are sensitive to leakage currents as small as 5 milliamperes and will trip to prevent harm, making them essential for circuits in locations where the risk of electric shock is higher due to the potential presence of water.