1939110-125V GFCI Receptacle Tester


Detects probable improper wiring conditions in 110-125VAC. To avoid erroneous readings, unplug any appliances or equipment on the circuit being tested. Consult the GFCI manufacturer's installation instructions to determine that the GFCI is installed in accordance with the manufacturer's specifications. Check for correct wiring of receptacle and all remotely connected receptacles on the branch circuit.


  • With UL and cUL Approval.
  • Detect faulty wiring in 3 wire receptacle.
  • Test for GFCI receptacle for proper operation, 110-125V circuits.
  • Various combinations of three lights tell if wiring is correct or six possible faulty conditions.
  • Plug Type: TYPE B for US
  • Patented.


OPERATING TEMPERATURE                                        5-40°C (41-104°F)
OPERATING HUMIDITY Max 80% with temperature up to 30°C (86°F);
linearly decreasing to 50% at temperature 40°C (104°F)
ALTITUDE <2000m (7000ft)
SIZE 108mm x 45mm x 28mm
  1. Always test on a known good circuit before use.
  2. Refer all indicated problems to a qualified electrician.
  3. Lights will indicate circuit condition: Correct, Open Ground, Open Neutral, Open Hot, Hot/Ground Reversed, or Hot/Neutral Reversed.
  4. The tester will not indicate the quality of the ground connection, 2 hot wires in a circuit, a combination of defects, a combination of defects, or reversal of ground and neutral conductors.
  1. Before using the tester, press the TEST button on the installed GFCI receptacle, the GFCI should trip. If it does not, do not use the circuit and call a qualified lectrician. If it does trip, press the RESET button on the receptacle and plug in the tester.
  2. Verify that the wiring is correct.
  3. Press and hold the test button on the tester for at least 6 seconds,the indicator lights on the tester will shut off when the GFCI trips.
  4. If the circuit does not trip, either the GFCI is operable but the wiring is incorrect, or the wiring is correct and the GFCI is inoperable.
  5. When testing a GFCI installed in a 2-wire (non-grounded) system, the tester may indicate a faulty GFCI. If this occurs, press the TEST and RESET buttons on the GFCI to determine proper operation.
  6. GFCI test current is 6~9mA.