Thermon HSX - Manual (Page 10)

1. Refer to Thermon Installation Procedures, FORM CPD 1014, for general installation procedures, requirements and guidelines.
2. Upon receiving heating cable, check the cable to make sure the proper type and output have been received. All flexible cables
have the catalog number, voltage rating and watt output printed on the outer jacket.
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 heat-
ing cable bus wires and the heating cable metallic braid.
IEEE 515.1 recommends that the test voltage for polymer insu-
lated 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 dam-
aged. 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. Apply rated voltage to the heat
tracing circuit(s) for 10 minutes. Record the ambient temperature, measure and record the circuit(s) voltage and current.
(Record 4 on Cable Testing Report.)
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
9
WarmTrace
TM
HSX Cable Testing Report