SEW TEL-5 Electrical Outlet Tester with GFCI Test ia a handy tool for testing correct wiring in AC outlet sockets and for testing GFCI (Ground Fault Circuit Interrupter) function.

Test wiring of both standard and GFCI outlets. Plug the tester into a socket and a combination of LEDs indicates correct wiring or one of these common wiring faults:

Open Ground
Open Neutral
Open Hot
Hot and Ground Reversed
Hot and Neutral Reversed

For GFCI outlets, the "test" button simulates a ground fault to ensure a GFCI outlet trips properly.