The answer to 'do I need switch' is that in most cases, yes, you will need a switch to control electricity in your home. Switches are an essential electrical component that allow you to turn lights, appliances, and other devices on and off. They interrupt the flow of electricity, giving you control over the power supply.
Switches come in a variety of types, such as single-pole, double-pole, and three-way, depending on the specific application. The type of switch you need will depend on factors like the number of controlled circuits, the type of load (lighting, motor, etc.), and the desired functionality. Properly installing and wiring switches is important for safety and code compliance.