WarmlyYours TempZone Floor Heating Cable (Twin) - Manual (Page 23)

Figure 9. Attachment points for ohm readings
Testing SECTION 6
6.4 Go by the Numbers
The resistance should be measured from the inner core of the yellow (120V) or red (240V) lead wire at one end to the inner
core of the black lead wire at the other end. Make sure that the probe of the ohmmeter or PowerMan™ does not touch
the tinned sheath wire at either end. Do not hold the wires onto the probes with your fingers. Even your body’s electrical
resistance can affect the reading if you touch the meter poles. A digital meter is easier to use and strongly recommended.
Verify that the batteries of the ohmmeter or PowerMan™ are good. Set your ohmmeter or PowerMan™ to measure
resistance in the range of 0 to 200 Ω.
For cables that have over 200 Ω resistance, it may be necessary to set the ohmmeter to the next higher range of
measurement to get an accurate ohm reading. This is not necessary when using PowerMan™.
Three (3) ohm readings should be taken for each WarmlyYours TempZone™ Floor Heating Cable at each stage of the
installation and recorded in the table on the warranty card in section 10. Refer to Figure 9 for instructions about how to
attach the ohmmeter or PowerMan™ to take each type of reading.
1. Core to Core: This is the reading between the two inner conductors on the lead wires.
2. Core to Sheath, Yellow / Red Lead: This is the reading between the inner core and the outer ground sheath on the lead
wire. This reading should be infinity.
3. Core to Sheath, Black Lead: This is the reading between the inner core and the outer ground sheath on the lead wire at
the finish point of the cable. This reading should be infinity.
Yellow
or Red
Ground
Ground
Yellow
or Red Black
Black
Yellow
or Red
Ground
Ground
Yellow
or Red Black
Black
Yellow
or Red
Ground
Ground
Yellow
or Red Black
Black
Core to Core Core to Sheath Core to Sheath
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