WarmlyYours TempZone Floor Heating Cable (Twin) - Manual (Page 28)

Additional Information for Identifying Electrical Shorts
In some rare occasions during installation, a high pressure point on the cable can occur and cause a break in the insulation
between the core conductor and the metal sheath. This opening in the insulation layer can create an electrical short,
even though the ohm reading from one line conductor to the other line conductor is normal and does not indicate a
circuit break. In these rare circumstances, a continuity test will show no continuity (a reading of infinity) between the line
conductor and the ground wire and/or between the other line core conductor and the ground. A megaohm meter can be
used to test the wire insulation in these cases.
There should be no continuity (indicated by a resistance reading of infinity, not zero) between each line conductor and
ground. If the ohmmeter or PowerMan™ reveals continuity between both the line conductor and ground, there is a short in
the circuit.
8.2.4. Checking for Breaks or Shorts Using an Underground Fault Detector
There are two ways to locate breaks or electrical shorts with underground fault detectors:
1. A break or short can most easily be found with a high potential (hipot) insulation tester, a high-voltage generating device
that generates a ground or heat at the break point. The hipot can be used with infrared cameras to scan the floor and
detect the exact location of the break. Contact WarmlyYours for more information about renting our troubleshooting kit.
2. A break or short can sometimes be found with a time domain reflectometer (ShortStop fault finder), which measures the
distance of the wire between the tester and the short point. A floor plan with the layout of the installation is required to
determine the location of the short.
Troubleshooting SECTION 8
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