A bare copper grounded service-entrance conductor is permitted to be used in which type of gutter?

A bare copper grounded service-entrance conductor is permitted to be used in an auxiliary gutter. Auxiliary gutters are typically used to house and protect conductors that are not part of the main electrical feed, such as grounded conductors. These gutters provide a way to organize and manage additional wiring components safely.

Using a bare copper conductor in an auxiliary gutter is ideal because these conductors require grounding and need to remain visible to facilitate inspection and maintenance. This visibility aligns with safety practices, as it allows for identification and ensures that proper maintenance protocols can be followed. Additionally, the nature of auxiliary gutters—designed to support the organized routing of various electrical conductors—makes them suitable for this type of conductor usage, ensuring that it remains compliant with applicable electrical codes and safety standards.