Is it true that a single equipment grounding conductor can be used when multiple multi-conductor cables are installed in parallel?

The correct choice highlights an important principle regarding grounding conductors in parallel installations. When multiple multi-conductor cables are installed in parallel, they can indeed share a single equipment grounding conductor as long as they are all connected at both ends. This parallel connection allows for the effective grounding of all the cables while reducing the amount of wiring required.

This approach is based on the understanding that grounding conductors are intended to safely carry fault currents back to the source and provide a low-resistance path to ensure safety. When connected properly at both ends, the single equipment grounding conductor can adequately protect the entire system against electrical faults.

Other options include conditions that either impose unnecessary limitations or suggest practices not allowed by code. They might not align with best practices or regulatory standards regarding grounding for safety.