Which section requires conductors and wiring installations to be free of short circuits and any grounding connections other than those specifically permitted?

The correct choice indicates Section 110.7, which emphasizes the importance of ensuring that conductors and wiring installations are free from short circuits and that any grounding connections are limited to those explicitly allowed within the regulations. This requirement is critical in maintaining the safety and functionality of electrical systems, as short circuits can lead to equipment failure, fire hazards, and electric shock risks.

By stipulating that only permitted grounding connections are allowed, this section helps prevent potential pathways for stray current or unintended interference that could compromise the system's integrity. This regulatory focus is essential for the safety standards within electrical installations, as improper grounding can lead to various electrical issues.

Other options provided in the question pertain to different aspects of electrical installations and safety. Understanding the specific focus of each section helps in navigating the National Electrical Code (NEC) comprehensively, ensuring that installations are performed to the highest safety standards.