What symbol represents a ground fault circuit interrupter (GFCI) in TPC schematics?

In TPC schematics, the symbol that represents a ground fault circuit interrupter (GFCI) is identified as a circle with an "A" inside. This specific symbol is designed to help those familiar with electrical diagrams quickly recognize the function of the GFCI, which is to interrupt the electrical circuit when it detects an imbalance between the incoming and outgoing current, thereby protecting against electrical shocks.

Understanding the importance of the GFCI is crucial, as it is commonly used in areas where water is present, like kitchens and bathrooms. The symbol serves as a visual cue for technicians and electricians, enabling them to quickly ascertain safety features within the electrical system.