Final answer:
The statement is false; GFCI outlets must be readily accessible as per the National Electrical Code to ensure they can be tested and reset to maintain safety. They prevent electric shock by detecting current imbalances and are essential in areas where water and electricity could meet.
Step-by-step explanation:
The statement that GFCI devices do not need to be readily accessible is false. GFCI devices, or ground fault circuit interrupters, are critical safety devices that prevent electric shock by detecting imbalances in electric current. According to the National Electrical Code, GFCI outlets must be readily accessible so that they can be easily tested and reset. This is essential for maintaining their proper function and ensuring electrical safety in places where water and electricity could potentially come into contact, such as kitchens and bathrooms. The rules for GFCI placement are made to protect individuals from potentially hazardous shock due to unintended paths of current flow, commonly caused by damaged insulation or water penetration.
GFCI's work by comparing the currents in the live/hot and neutral wires and tripping to interrupt the circuit if a leakage current greater than 5 mA is detected. An isolation transformer, on the other hand, insulates the device being powered from the original source to prevent shock. Understanding the mechanism of operation and importance of these safety devices can greatly reduce the risk of electric shock, property damage, and fires caused by electrical malfunctions.