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7
poWer supplY anD eleCTriCal
proTeCTion
Do not energize cable when it is coiled or on the reel.
7.1 earth connection
Bond the metal sheath of the heating cable to a suitable earth
terminal.
7.2 electrical loading
Size overcurrent protective devices according to the design specification
and/or local standard practices.
7.3 residual current (earth fault) protection
Pentair Thermal Management requires the use of a 30mA residual
current device to provide maximum safety and protection. When design
results in a higher leakage current, a maximum 300mA RCD may be
used. All safety aspects need to be proven. Also refer to local standards.
Special regard should be given to electrical safety in IT power networks
where use of RCD is restricted. For any heating cables installed in a
hazardous area, the use of residual current devices is mandatory by the
electrical codes and standards.
7.4 isolation from power supply
For any heating cables installed in hazardous areas a means of isolation
all line conductors from the supply is recommended.
7.5 Circuit marking
Make sure for all hazardous area installations, that system is properly
marked with a heating cable tag.
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