The answer to 'how to install electrical wiring' is to plan the wiring layout, turn off power, install junction boxes, run wires through walls, connect wires to outlets and switches, and test the system. Proper planning, safety precautions, and following local electrical codes are essential for a successful installation.
Before starting any electrical work, it's important to turn off power to the area you'll be working in at the circuit breaker. This prevents the risk of electric shock. You'll also need to plan where you want to place outlets, switches, and other electrical components, and map out the wiring routes through the walls. Be sure to use the right size wire and install junction boxes at all connection points.