5-6. Ground Fault Protection
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Ground fault protection circuitry automatically shuts down the power source output if a potentially hazardous condition exists at the heating device connected to the power source (e.g. insulation has broken down on a heating blanket causing the conductor to come into contact with the workpiece or a heating coil touches the workpiece causing a short in the output circuit).
The supplied ground lead must be connected between the workpiece and power source to provide proper ground fault protection from a short in the output circuit.
1Power Source
2Receptacle
3Plug
To connect plug, align key with key- way, insert end into receptacle, and rotate plug until tight.
4Handle
5Magnet
6Workpiece
Use handle to place magnet on the workpiece.
Ref.