What is the primary advantage of using cables with thicker insulation in ungrounded systems?

The primary advantage of using cables with thicker insulation in ungrounded systems is that they enhance safety and reliability. Thicker insulation provides a greater barrier against electrical faults and leakage currents, which is particularly important in ungrounded systems where there is no direct path to ground. This added insulation helps to prevent accidental contact with live wires, reducing the risk of electrical shock and increasing the overall safety of the system. Additionally, thicker insulation can improve the reliability of the system by minimizing the likelihood of insulation breakdown or failure, thereby maintaining system integrity and performance over time.