Amprobe AT-8020 Mode D'emploi page 25

4. SPECIAL APPLICATIONS
Figure 3.4: Voltage detection in NCV mode using Tip Sensor
4.1 GFCI-Protected Circuit Wire Tracing
Connecting AT-8000-T Transmitter to GFCI protected circuits.
Connecting the Transmitter to an Energized GFCI protected circuit using separate ground
method will trip the GFCI protection. Use following methods to work with GFCI protected
circuits (for De-energized GFCI-protected outlet that is not tripped, you can connect test
leads directly to the outlet contacts using De-energized TIP SENSOR mode)
Method 1 – Bypass the GFCI circuitry to avoid tripping GFCI:
(for Energized GFCI-protected outlets only)
• Remove the protective receptacle wall plate.
• Using the alligator clip attach the red test lead to the screw connecting the Energized
hot wire to the receptacle.
• Connect the green test lead using separate ground method as described in Energized
TIP SENSOR mode.
• Perform tracing as described in one of the Energized modes: SMART SENSOR
SENSOR or BREAKER.
Method 2 – Do NOT use separate ground to avoid tripping GFCI:
(for GFCI-protected outlets and breakers)
• Connect Transmitter test leads to Neutral and Hot wires.
• Perform tracing as described in one of the Energized modes: SMART SENSOR
SENSOR or BREAKER.
Note: This type of connection causes signal coupling and reduces signal strength. If the
signal is too weak or untraceable, use Method 3.
Method 3 - De-energize the circuit:
(for GFCI-protected breakers)
• De-energize the circuit.
• Connect Transmitter directly to the wire as described in De-Energized TIP SENSOR mode.
• Perform tracing as described in the desired De-Energized mode (TIP SENSOR for wire
tracing or BREAKER for breaker identification).
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