21
7
Power Supply and Electrical
Protection
Raychem-IM-H57548-HWATsystem-EN 16/08
7.4
Ground-Fault Protection
If the heating cable is improperly installed, or physi-
cally damaged to the point that water contacts the
bus wires, sustained arcing or fire could result.
If arcing does occur, the fault current may be too
low to trip conventional circuit breakers. Pentair
Thermal Management, the U.S. National Electrical
Code, and the Canadian Electrical Code require both
ground-fault protection of equipment and a ground-
ed metallic covering on all heating cables. All HWAT
heating cables meet the metallic covering require-
ments. Ground-fault protection must be provided by
the installer.
WARNING: To minimize the danger of fire from
sustained electrical arcing if the heating cable is
damaged or improperly installed, and to comply with
Pentair Thermal Management requirements, agency
certifications, and national electrical codes, ground-
fault equipment protection must be used on each
heating cable branch circuit. Arcing may not be
stopped by conventional circuit breakers.
WARNING: Disconnect all power before making
connections to the heating cable.
