Page 185 - Electromechanical Devices and Components Illustrated Sourcebook

Chapter 8 Circuit Protection 147

Grounded Top Wire switches off the power. The acceptable current bleed rate to
ground is extremely low and in this way the interrupter can
monitor the condition of isolation in the circuit. Figure 8-45
shows a typical 120-VAC receptacle with an integral ground
Cone of Protection
fault interrupter.
Transmission Line

Mount Tabs
Body
Pole
Ground Wire

Reset Button Load Terminals
Figure 8-44 Lightning Protection on Power Transmission Pole
Test Button
Line Terminals
Receptacles
Ground Fault Interrupter
Ground fault interrupters are solid-state devices that monitor
the current flow between the power line and the ground. If the
current flow is above a preset limit, the interrupter automatically Figure 8-45 Ground Fault Circuit Interrupter Receptacle