Simple Ground Tester Safety Circuit Diagram. This circuit is very simple and easy safety ground tester circuit, This circuit checks the reliability of appliances so that the equipment may be used safely. The test circuit must be plugged into a properly wired three terminal wall outlet.
When a two-lead or three-lead appliance is plugged into circuit outlet SOI, neon lamps NE1 and NE2 will light if the appliance is safe. If neon NE2 is lit the appliance is dangerous, because the neutral lead is 110 Vac above ground.
Simple Ground Tester Safety Circuit Diagram
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