Installation Guide

INSCT0816
7
TEST # 2: VALIDATION OF THE NON-CONTINUITY BETWEEN
THE HEATING WIRE AND GROUND BRAID
This test requires the use of a multimeter.
N.B. Since all measuring instruments are different, we
recommend you to consult the non-continuity test section
of your instrument user’s guide.
TEST # 3: INSULATION RESISTANCE TEST (CAPACITY OF THE CABLE ELECTRICAL INSULATOR TO PREVENT CURRENT LEAKAGE)
CAUTION: HIGH VOLTAGE TESTING
This test requires the use of a 1000 V megohmeter.
N.B. Since all megohmeters are different, we recommend you consult your instrument’s user guide.
The heating cable is protected by a ground braid. An electrical
insulator prevents any contact between the braid and the two
conductors. To make sure there is no contact between the braid and
the conductors, you must perform a non-continuity test. Using the
continuity test (buzzer logo) function of your multimeter, test your
cable between the braid and one of the two power leads. If there
is no continuity (if the test is successful), the multimeter will display,
depending on the instrument used, either “OL” for “over load” or “I”
for “innity”. Otherwise, if the test fails, neither “OL”, nor “I” will be
displayed and a warning tone will be heard. The test result must be
recorded on your warranty card.
This test is meant to detect very small breaks throughout the cable insulation. These breaks often remain undetected during the continuity test since they are not
necessarily short circuits between the conductors and the ground braid.
Even though they are small, these breaks are likely to cause a current leakage to ground. Such a leakage is usually detected by the mandatory ground-fault circuit
interrupter “GFCI” (thermostat with integrated GFCI or panel mount GFCI). When a current leakage is detected, the GFCI trips the circuit, hence disabling the
oor heating system.
In order to perform the insulation resistance test, you must, using a megohmeter (Mohm logo), take an insulation measurement between the braid and one of
the two power leads. Make sure the megohmeter range is set at 1000 V. The insulation resistance measurement must be equal to or greater than 1 Gigaohms
(1 Gigaohms = 1 G ohms = 1000 M ohms = 1000 Mega ohms). The insulation resistance measurement must be recorded on your warranty card.
FIGURE 6
FIGURE 7 FIGURE 8
TEST 2 - CONNECTIONS
TEST 3 - CONNECTIONS