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The Leviton M21-GFNT1-03I is a 15-amp self-test slim GFCI outlet designed to protect against electrical shock and electrocution by interrupting power when a ground fault is detected. The device automatically performs its own self-test on a regular basis, requiring no manual intervention to verify correct operation. A slim-profile body allows the outlet to fit into standard electrical boxes with minimal clearance issues, making installation straightforward for electricians in both new construction and retrofit applications. The reset lockout feature prevents the device from resetting if it is miswired or has failed, ensuring a non-functional device cannot be placed back into service unknowingly.
This outlet is rated for installation in areas where water exposure is a concern, including kitchens, bathrooms, laundry rooms, basements, garages, and outdoor locations. It meets or exceeds National Electric Code requirements for GFCI protection in wet and damp locations. The self-test function meets the latest UL standards for auto-monitoring, confirming reliable ground-fault response without manual testing intervals. This listing contains 5 outlets, suitable for stocking service trucks or completing multi-outlet installations in a single trip.
Designed as a standard 15-amp GFCI outlet replacement or new installation device for residential and light commercial wet and damp location applications per NEC requirements.
Installation must be performed by a licensed electrician in accordance with NEC and applicable local codes. Always shut off the circuit breaker supplying the outlet before beginning any wiring work and verify the circuit is de-energized with a non-contact voltage tester. Follow the line and load terminal labeling on the device precisely, as incorrect wiring will trigger the reset lockout and prevent the outlet from functioning. Standard single-gang electrical boxes are required; verify box fill calculations comply with NEC Article 314 before installation.
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