What is a required arming safety feature for flame effects control systems?

A removable activator serves as a crucial safety feature for flame effects control systems, ensuring that the system cannot be unintentionally activated. This feature is designed to provide an additional layer of security by requiring an authorized user to insert the activator before the system can be armed or used. The intent is to prevent accidental discharge of flame effects, thereby reducing the risk of fire hazards and potential injuries to the audience or performers.

While visual indicators can provide important information about the system's status, they don't prevent activation. Similarly, a fire alarm system is necessary for overall safety but is not specific to arming the control system. Although sound alerts can provide warnings or cues, they do not directly prevent unauthorized or accidental use of flame effects. Thus, the removable activator is specifically tailored to enhance safety during the operational phase of flame effects, meeting the standards established in NFPA 160.