Which component is necessary according to group V's minimum control requirements?

In the context of group V's minimum control requirements as specified by NFPA 160, the necessity of a flame effect safety control system sequenced by the main control system is crucial because it ensures a coordinated and effective response to any deviations or emergencies that may arise during a flame effect performance. This system serves as a pivotal component in managing the flame effects safely, allowing for real-time oversight and control during the event.

A flame effect safety control system sequenced by the main control system is designed to integrate various safety measures. This ensures that if there are any malfunctions or abnormal conditions detected, the system can automatically respond according to pre-established protocols, thus maintaining safety for both the performers and the audience.

While other components, such as a fail-safe automatic shutdown system, a manual fuel shutoff valve, and a visual monitoring system for the audience, also play significant roles in overall safety and effectiveness, they do not encompass the broader and more comprehensive control aspect provided by a flame effect safety control system. This system is specifically aimed at real-time management and ensures that multiple safety features operate in harmony to protect everyone involved.