What voltage do I need in a residential garage?

The voltage required for a residential garage depends on the specific electrical needs of the equipment and appliances that will be used in the garage.
Most homes in the United States have a standard electrical service of 120/240 volts. This means that there are two hot wires each carrying 120 volts, and a neutral wire that carries 0 volts. The two hot wires are used to provide a 240-volt supply to high-power appliances like electric water heaters, electric dryers, and electric stoves.
For most residential garage applications, a 120-volt electrical service is sufficient. This is because most garage appliances, such as lighting, power tools, and small appliances, are designed to run on 120 volts. However, if you plan to use high-powered equipment, such as an electric car charger, you may need a 240-volt electrical service.
It's important to have a licensed electrician evaluate your garage's electrical needs and provide recommendations for the appropriate voltage and electrical service. They can help ensure that the electrical system is properly installed and meets local building codes and safety requirements.