FLX
™ Cable Testing Report
1. Refer to Thermon FLX Installation Procedures, FORM CPD1018, for general installation procedures, requirements and guide-
lines.
2. Upon receiving heating cable, check the cable to make sure the proper type and output have been received. All cables are
printed on the outer jacket with part number, voltage rating and watt output.
3. Visually inspect cable for any damage incurred during shipment.
The heating cable should be tested to ensure electrical integrity
with at least a 500 Vdc megohmmeter (megger) between the
heating cable bus wires and the heating cable metallic braid.
IEEE 515.1 recommends that the test voltage for polymer
insulated heating cables be 2500 Vdc. Minimum resistance
should be 20 megohms. (Record 1 on Cable Testing Report.)
A. Connect the positive lead of the megger to the cable bus
wires.
B. Connect the negative lead of the megger to the metallic braid.
C. Energize the megger and record the reading. Readings between 20 megohms and infinity are acceptable. Readings
below
20 megohms may mean the electrical insulation has been damaged. Recheck the heating cable for physical damage
between the braid and the heating element; small cuts or scuffmarks on the outer jacket will not affect the megger
reading unless there was actual penetration through the braid and dielectric insulation jacket.
4. Once the installation is complete, but prior to installation of thermal insulation, recheck the heating cable with at least a
500 Vdc megohmmeter (megger) between the heating cable bus wires and the heating cable metallic braid. IEEE 515.1
recommends that the test voltage for polymer insulated heating cables be 2500 Vdc. Minimum resistance should be 20
megohms. (Record 2 on Cable Testing Report.)
5. After the thermal insulation is installed, the megohmmeter test should be repeated. Minimum resistance should be 20
megohms. (Record 3 on Cable Testing Report.)
6. After the thermal insulation is installed and power supply is completed, record the panel and circuit breaker information.
Ensure all junction boxes, temperature controllers, cable glands, etc. are properly secured. Set the temperature controller
NOTE: To ensure the heating cable warranty is maintained through installation, the testing outlined on
this sheet must be completed on the installed heating cables, and the test results recorded and
mailed/faxed to:
Thermon Customer Service
100 Thermon Drive
San Marcos, Texas 78666
Fax: 512-754-2420
7
