The specific regulations and guidelines regarding the placement of electrical outlets above countertops can vary depending on the region and local building codes. However, I can provide you with some general information that is commonly followed.
In the United States, according to the National Electrical Code (NEC), the minimum requirement for countertop electrical outlets in residential kitchens is that there should be at least one receptacle outlet installed above the countertop, within a distance of 20 inches horizontally from any point along the countertop's length. This distance is measured along the wall line without passing through doors, archways, or other openings. The outlets should also be installed within a maximum height of 20 inches above the countertop.
It's worth noting that some local jurisdictions may have additional requirements or variations on these guidelines. It's always a good idea to consult your local building codes or consult with a qualified electrician for specific regulations in your area.
Please keep in mind that electrical codes and regulations can change over time, so it's important to refer to the most current version of your local building codes to ensure compliance.