A Listed for Fire Protection Service Heat Tracing System (e.g. Tyco Thermal Controls LLC, Thermon Mfg. Co., or EGS Heating Cable Systems – Div. of EGS Electrical Group LLC) is an acceptable method of Freeze Protection. The system shall include the following:
Heat tracing type/model selected
per Manufacturer’s recommendations.
2) Insulation per Manufacturer’s
3) Connection end pilot
light located where it is readily visible upon inspection.
Sensing set at 40ºF either directly or through an appropriate contactor.
Line Sensing located on opposite end from connection end pilot light.
Ground fault circuit breaker
with a 30mA trip level (such as Square D QO-EPD and QOB-EPP or
equivalent) per NEC (NFPA 70, 2000 edition) requirements.
6) Monitoring by Fire Alarm System for
trouble conditions per NFPA 72 (1996), Section 3-8.6.2.
a) Apply the heater
linearly on the pipe after piping has been successfully pressure tested. Secure
the heater to piping with cable ties or fiberglass tape.
b) Apply ‘Electric
Traced’ signage to the outside of the thermal insulation.
a) After installing and
before and after installing the thermal insulation, subject heat to testing
using a 2500 VDC megger. Minimum insulation resistance should be 20 megaohms
regardless of length.
b) The installer shall test both heating cable bus
wires to verify the connection of any splices of tees.