Which of the following circuits is mentioned as having a specific restriction regarding grounding?

The correct answer highlights that circuits for electrolytic cell line working zones are subject to specific restrictions regarding grounding because of the unique safety and performance requirements associated with them. In environments where electrolytic processes are used, the risk of shock or other electrical hazards can be elevated. Therefore, implementing particular grounding practices is crucial to ensure both the safety of personnel and the effective operation of the equipment involved in these processes.

Grounding requirements in such circuits might include special electrode installations, maintenance of ground resistance at specified levels, and the potential necessity to use barriers or additional protective measures to enhance safety due to the corrosive environments often associated with electrolytic cells. This context emphasizes the importance of adhering to established codes and standards that govern these specific operations, which are more stringent than for general residential or outdoor lighting circuits.

In contrast, the other circuits listed generally do not have the same level of stringent grounding restrictions as those found in electrolytic cell work environments. Street lighting and outdoor circuits typically follow general grounding practices, while residential systems are governed by well-defined standards that do not encompass the specialized considerations necessary in industrial or process-specific scenarios like electrolytic cell circuits.