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WARNINGS - NCV FUNCTION
• When NCV Function is initiated, a blinking or steady green glow and an audible
beep indicate voltage present. If no indication, voltage could still be present.
• Before and after each use of the NCVT, verify operation by testing a known
working circuit that is within the rating of this unit.
• Never assume neutral or ground wires are de-energized. Neutrals in multi-wire
branch circuits may be energized when disconnected and must be retested
before handling.
• The NCV tester WILL NOT detect voltage if:
• The wire is shielded.
• The operator is not grounded or is otherwise isolated from an effective earth
ground.
• The voltage is DC.
• The NCV tester MAY NOT detect voltage if:
• The user is not holding the tester.
• The user is insulated from the tester with a glove or other materials.
• The wire is partially buried or in a grounded metal conduit.
• The tester is at a distance from the voltage source.
• The field created by the voltage source is blocked, dampened, or otherwise
interfered with.
• The frequency of the voltage is not a perfect sine wave between 50 and 500Hz.
• The tester is outside of operation conditions (listed in Specifications section).
• Operation may be affected by differences in socket design and insulation
thickness and type; tester may not be compatible with some types of standard
or tamper resistant (TR) electrical outlets.
• Do not apply to uninsulated hazardous live conductors.
• Detection above 50V is specified under “normal” conditions as specified below.
The tester may detect at a different threshold at different conditions, or may not
detect at all unless:
• The tip of the tester is within 0.25" of an AC voltage source radiating
unimpeded.
• The user is holding the body of the tester with his or her bare hand.
• The user is standing on or connected to earth ground.
• The air humidity is nominal (50% relative humidity).
• The tester is held still.
www.calcert.com sales@calcert.com1.800.544.2843
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