HD110301-1 Rev2
Page 21 of 23
TESTING SELF-REGULATING CABLE
A test should be performed when the heating cable is received, prior to installation and after
installation using a 500 VDC megger.
Note: Do not use a megger in excess of 2500 VCD.
Detecting cable damage prior to the application of insulation can prevent additional labor costs.
Minimum readings of 20 Megohms for each circuit is an acceptable level to test for.
A record should be kept of the reading after the cable has been installed. This reading can be used
as a reference point when taking future readings during regular maintenance.
A history of resistance readings can be useful in spotting moisture ingression into the cable from
either junction boxes or physical damage to the cable.
See the following page for a “Test Report” template.
