Auxiliary gutters shall not contain more than how many current carrying conductors without derating?

Auxiliary gutters are designed to carry multiple conductors while allowing for safe and efficient operation of electrical systems. The limit on the number of current-carrying conductors that can be placed in these gutters without requiring derating is set to maintain safety and performance standards.

In this context, the maximum allowable number of current-carrying conductors in auxiliary gutters without derating is indeed 30. This figure is derived from the National Electrical Code (NEC) guidelines, which aim to prevent overheating and potential hazards that can arise from having too many conductors in a confined space. When the number of conductors exceeds this limit, derating becomes necessary to ensure that the conductors can safely handle their load without exceeding temperature ratings, which could lead to insulation breakdown and fire risk.

Thus, maintaining the correct number of conductors in auxiliary gutters is crucial for compliance with safety regulations and the efficient functioning of electrical systems.