Using a 12-gauge wire for countertops is not a common practice or requirement. Generally, electrical wiring for countertops is done using specific electrical cables that are designed for that purpose and comply with local building codes and regulations.
The appropriate wire gauge for countertop electrical wiring typically depends on the specific electrical load and the distance from the power source. Commonly, 14-gauge or 12-gauge electrical wires are used for general residential wiring, but the gauge required for countertop wiring may vary based on the specific electrical requirements.
It is essential to consult with a licensed electrician or electrical professional who can assess your specific electrical needs and ensure that the wiring is done safely and in compliance with local electrical codes. They will be able to determine the appropriate wire gauge, circuit design, and any additional safety measures required for your countertop electrical installation.