CT70 V7.0 09/10
5
The Voltage menu displays the True RMS line voltage. Use the
►
button to scroll the
Voltage sub-menu (line voltage, ground-to-neutral voltage, Peak Voltage (P), and
Frequency (Hz)).
The Voltage Drop (Vd) window indicates percent voltage drop (with 15A load) and the
Loaded Voltage (Vl). The voltage drop sub-menu offers a load voltage result for 20A and
12A loads. Use the
►
button to scroll the sub-menu.
The Impedance (Z) window indicates the impedance in ohms of the hot conductor. The
impedance sub-menu displays the neutral (N) and ground (G) conductor impedances. Use
the
►
button to move through the sub-menu.
Note that testing ground impedance will trip a GFCI circuit.
The ASCC window indicates the Available Short Circuit Current that the branch current can
move through a breaker in a short circuit situation.
GFCI Button
The GFCI (Ground Fault Circuit Interrupt) feature performs two tests:
GFCI
: Faults a circuit when 6 to 9mA from hot to ground is detected
EPD
(Equipment Protective Device): For breakers equipped with an EPD, the breaker
trips for ground faults greater than 30mA.
To display the GFCI main menu window, press the GFCI button. To toggle the two tests use
the
►
button. Once the desired test is selected, press the GFCI button to start the test.
These tests are further detailed below.
