Chromalox Big Red Book

COMMERCIAL HEAT TRACE

WTP,WTPM FreezeProtection Heat TracePanels (cont’d.)

Line Sensing Single Phase 240/120

N

L1 L2

THREE-POLE MAIN CIRCUIT BREAKER

CONNECTION POWER

THERMOSTAT *LINE-SENSING

END SEAL

ONE-POLE WITH 30mA GROUND FAULT TRIP

C NC

HEATING CABLE

(120/277 VAC)

PROTECTION FREEZE- CIRCUIT

*LINE-SENSING THERMOSTAT

TWO-POLE WITH 30mA (208/480 VAC) GROUND FAULT TRIP

HEATING CABLE

C NC

FREEZE- PROTECTION CIRCUIT

*EXTERNAL CONTROLLER/THERMOSTAT SOLD SEPARATELY

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