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3.3 NCV Mode and Passive Tracing
The NCV (Non-Contact Voltage) mode is used to verify if the wire is energized and to
perform tracing without the use of the transmitter. The receiver will detect and trace an
energized cable if the voltage is between 90V and 600V AC and between 40 and 400Hz. No
current flow is necessary.
Note: For safety, before working with wires, always verify that they are de-energized with
an additional voltage tester.
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The voltage indication in NCV mode is not sufficient to assure safety. This function is
not suitable to test for absence of voltage. This always requires a two-pole voltage test.
NCV mode operation:
1. Press ‘ON/OFF’ push button to turn on the receiver.
2. Continue pressing MODE button until the Non-Contact Voltage function is selected.
For Passive Tracing
Scan target area with Tip Sensor to find highest signal level. While tracing, periodically
adjust sensitivity to keep signal strength near 50. Increase or decrease sensitivity by pressing
+ or - on the keypad.
For verifying if wire is energized:
Hold the receiver with the Tip Sensor against the wire. For precise pinpointing of line/phase
wire versus neutral wire, increase or decrease sensitivity by pr or - on the keypad.
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NCV
Voltage detection in NCV mode using Tip Sensor
figure 3.3a
3. MAIN APPLICATIONS – NVC MODE AND PASSIVE TRACING