Which of the following can contribute to improving voltage drop?

Reducing circuit load can indeed contribute to improving voltage drop. Voltage drop occurs when the electrical current passing through the conductor encounters resistance, leading to a loss of voltage along the length of the cable. By reducing the circuit load, the amount of current flowing through the conductor decreases. This lower current generates less heat and causes a smaller voltage drop across the conductor, resulting in more voltage being maintained at the load end of the circuit.

Since voltage drop is closely linked to Ohm's Law (V = I x R), where V is voltage drop, I is current, and R is resistance, decreasing the current directly reduces the voltage drop. Keeping the load at an optimal level is crucial for ensuring that the equipment or fixtures receiving power operate efficiently and reliably.