In most electric appliances, the switches are typically placed in the "hot" wire. The hot wire carries the current from the power source to the appliance, allowing it to operate. The other wire is known as the "neutral" wire, which provides the return path for the current back to the power source.
By placing the switch in the hot wire, it effectively interrupts the flow of current when the switch is turned off. When the switch is in the off position, the circuit is broken, and no current can flow to the appliance, preventing it from operating.
It's important to note that electrical wiring and safety standards can vary depending on the country or region. Always follow proper safety procedures and consult an electrician or the manufacturer's instructions for specific appliances to ensure correct wiring practices.