According to project specifications, what must be ensured for any branch circuit over 50 feet?

For any branch circuit exceeding 50 feet, it is essential to use a larger gauge wire. This requirement is primarily to minimize voltage drop, which can occur over longer distances. When electrical current travels through a conductor, there is inherent resistance, causing some voltage loss along the way. As the distance increases, the voltage drop can become significant, leading to inefficient operation of electrical devices and potential issues with performance.

Selecting a larger gauge wire (which has a lower resistance compared to smaller gauge wire) helps to reduce this voltage drop, ensuring that the devices at the end of the circuit receive the appropriate voltage necessary for optimal operation. This practice is crucial in maintaining electrical efficiency and safety within installations, particularly in branch circuits where consistent performance is needed.

While there may be other considerations or specific requirements based on project specifications, the fundamental logic behind using a larger gauge wire for longer runs is centered on maintaining voltage integrity and system performance, which underscores the correctness of the selected answer.