Proper ground fault protection, such as using a Ground Fault Interrupter (GFI), prevents electric shock when using a power drill by detecting and interrupting unintended current paths.
When using a power drill, proper ground fault protection will prevent electric shock. A Ground Fault Interrupter (GFI) detects loss of current to unintentional paths, while an isolation transformer insulates the device from the original source to prevent shock. Human bodies are good electric conductors, and the GFI helps to ensure safety by interrupting the circuit if the current flowing into the circuit differs from the returning current, suggesting a leakage to the ground.
Furthermore, insulated shoes provide a high resistance to electrical flow, thus preventing a path to ground. Lastly, circuit breakers and fuses, as well as a three-wire system with live/hot, neutral, and earth/ground wires, contribute to protecting against both thermal and shock hazards.
So, using a power drill with ground fault protection safeguards against possible electric shocks that might occur if the electrical insulation is compromised or direct contact with live wires is made.