Heat-Tracing Systems for Hazardous Division 1 Locations

Appendix C: Ground-Fault Equipment Protection DevicesGround-Fault Circuit Breaker Selection TableThe following breakers are available from your local Raychem distributor.Bolt-on styleManufacturer Square D Cutler Hammer (Westinghouse) Raychem TraceGuard*Voltage 120 208/240** 120 208/240** 27715 amps QOB115EPD QOB215EPD QBGFEP1015 QBGFEP2015 EHB14015EPD20 amps QOB120EPD QOB220EPD QBGFEP1020 QBGFEP2020 EHB14020EPD30 amps QOB130EPD QOB230EPD QBGFEP1030 QBGFEP2030 EHB14030EPD40 amps – – N/A QBGFEP2040 EHB14040EPD50 amps – – N/A QBGFEP2050 EHB14050EPDPanelboard NQOD NQOD POW-R-LINE 1 POW-R-LINE 1 NEHBPlug-on styleManufacturer Square D Cutler Hammer (Westinghouse) Raychem TraceGuard*Voltage 120 208/240** 120 208/240** 27715 amps QO115EPD QO215EPD QPGFEP1015 QPGFEP2015 N/A20 amps QO120EPD QO220EPD QPGFEP1020 QPGFEP2020 N/A30 amps QO130EPD QO230EPD QPGFEP1030 QPGFEP2030 N/A40 amps – – N/A QPGFEP2040 N/A50 amps – – N/A QPGFEP2050 N/APanelboard QO Load Center QO Load Center POW-R-LINE 1 POW-R-LINE 1Padlocks*** QO1PA GF12PA QLPB123PL QLPB123PL GFPOHPA-EH*Raychem’s TraceGuard 277 circuit breaker is manufactured by Square D.**Two-pole ground-fault breakers require 120 volts to power the internal electronics. 240-volt delta systems without a 120-volt neutral reference will require an additional transformer to providethe reference.*** Padlocks are required to comply with NEC section 427-55(a) if the circuit breaker is utilized for disconnecting.N/A = Not Available.Note: Bell alarm contacts may be ordered through your local electrical distributor by adding a “2100”suffix to the Square D part number or a “W1” suffix to the Westinghouse part number (example:QOB120EPD2100 is a 20-amp, 120-V breaker with bell alarm contacts).Neilsen-Kuljian Ground-Fault SensorsA Neilsen-Kuljian ground-fault sensor may be used for:• Ground-fault monitoring and alarm, per the exception to NEC Section 427-22• Applications where current or voltage exceeds the ratings of available ground-fault circuit breakers• Applications that require ground-fault trip levels other than 30 mA, such as 70 mA for VL heating cablesThe Neilsen-Kuljian ground-fault sensor has a ground-fault trip level adjustable from 1 to 100 mA. Aslong as a detected fault persists, the normally open switch will stay closed. It can be connected to analarm light or to the shunt-trip of a breaker. There is also an associated red light on the ground-faultsensor to indicate a fault. A green light is provided to indicate the presence of 120-Vac power. The sensoralso has a built-in TEST function, which simulates the fault and confirms that the unit is operational.Notes:1. When using 240-volt Raychem heating cables at operating voltages of 208 or 277 volts, use the circuit length adjustmentfactors in Appendix B.2. Circuit breaker trip rating should not exceed the maximum trip rating shown for heating cables of that product family.3. All Raychem heating cables must be installed in accordance with local codes and practices.47