Which of the following is NOT a common limitation of using limited-energy cabling?

The choice indicating low voltage requirement is indeed not a common limitation of using limited-energy cabling. In fact, limited-energy cabling is designed to operate at low voltages, which is one of its defining characteristics. This makes such cabling ideal for various applications, including those that require safety and reduced energy consumption.

The other options highlight prevalent issues encountered with limited-energy cabling. Distance limitations refer to the maximum length that signals can effectively travel over the cabling without degradation, which is an important consideration in system design. Temperature restrictions pertain to the operational limits of the cabling in different environmental conditions, where extreme temperatures can affect performance and safety. Conductivity issues relate to the material properties of the cables and can impact signal quality and reliability. Therefore, recognizing that low voltage is a standard and integral aspect of limited-energy cabling helps to clarify why this option does not fit within the common limitations.