Garage and shed wiring

Wire the building for what actually happens inside it.
Tools and equipment
List what will run, what may run together, and which equipment needs a dedicated connection.
Lighting and everyday power
Plan useful light, receptacles, and controls around benches, doors, storage, and working areas.
Room for the intended use
Consider the finished purpose of the building so the feed is not planned around an empty shell.
The feed and subpanel follow the load.
List the simultaneous loads
The useful question is not only what equipment exists, but what needs to run at the same time.
Review the route
Distance, access, finished surfaces, and the connection back to the house shape the installation plan.
Decide whether a subpanel fits
When the load needs one, a subpanel gives the detached building a clear local distribution point.