A separately derived AC system does not share which of the following?

In a separately derived AC system, it is defined by the fact that it is an electrical system that is generated independently of another electrical system and does not share any circuit conductors. This means that any conductors carrying current for this system are isolated from the conductors of other systems, ensuring there is no electrical connection between them. This separation enhances safety and helps prevent issues such as parallel paths that could lead to grounding problems or overloading.

This characteristic is pivotal because it helps in maintaining system integrity, reducing the risk of fault currents that can arise when systems are interconnected. Each separately derived system has its own grounding and bonding requirements, further emphasizing the need for isolation from other electrical systems.

In contrast, while circuit devices can be part of an interconnected system, the term "circuit conductor" specifically refers to the actual conductive pathways that deliver power, which must remain completely distinct in a separately derived system. Similar reasoning applies to voltage levels; while voltage levels can be established independently for each system, the focus here is specifically on the conductors. From this perspective, the choice clearly identifies the unique nature of a separately derived system.