Ground Fault Circuit Interrupter with Self-Test (GFCI) provides protection against overloads, short circuits, and ground faults. It detects very low levels of electrical leakage (ground faults) and quickly shuts off power to prevent severe electrical shocks, meeting the latest National Electrical Code (NEC) requirements. The plug-on neutral version (up to 30A) eliminates the need for pigtail neutral termination, speeding up installation and reducing wire clutter. Standard self-test functionality, LED indications, and a push-button test simplify troubleshooting. GFCI includes both 5mA and 30mA versions, suitable for personnel and equipment protection.