Final answer:
An energy-isolating device is not the same as an on/off switch; it is designed to physically disconnect equipment from the energy source for safety. An isolation transformer, which isolates electrical devices from the power source, typically has equal numbers of primary and secondary turns to keep input and output voltages the same.
Step-by-step explanation:
The statement that an energy-isolating device is the same as an on/off switch is false. An energy-isolating device is designed to physically disconnect the equipment from the energy source, ensuring that the machine or the equipment cannot be re-energized until the device is removed. Examples of energy-isolating devices include manual disconnect switches, circuit breakers, or valves. These devices are not the same as a simple on/off switch, which may not isolate equipment from the energy supply completely.
An isolation transformer is a specialized device used to decouple two circuits allowing current to flow without direct electrical connection, preventing shock hazards. It typically has equal numbers of primary and secondary turns, meaning the input and output voltages are the same, this maintains the power level while isolating the device. The high resistance between coils ensures that there isn't a complete circuit for current to flow from the transformer through a person to the ground, thus providing safety by isolation.