General Monitors 4802A Instruction Manual page 34

Model 4802A
The cable screens (drain wires) are interconnected in the housing as shown in figure 12.
The drain wire entering the junction box must be terminated on the SCReen terminal to
isolate it from all other circuits. It must not be connected to the sensor circuitry at any
point.
Connect the external earth stud in accordance with local practices if required.
Screw the lid down tightly to the base in order to ensure electrical continuity.
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