How many fire extinguishers are required for temporary installations with flame effects?

The requirement for four or more extinguishers for temporary installations with flame effects aligns with the NFPA 160 Standard, which emphasizes the importance of fire safety in environments where flame effects are used. The rationale behind this requirement is to ensure that there are enough extinguishers readily available to address potential fire hazards that might arise during performances.

Having multiple extinguishers increases the chances of a quick response in case of a fire outbreak, considering that flame effects can create significant risks. The NFPA 160 guidelines typically recommend that fire extinguishers be placed in accessible areas and strategically distributed to cover the entire stage and audience areas, ensuring immediate availability. Such preparedness is critical for the safety of both performers and audience members.

The other options do not provide adequate safety measures according to the standard. For instance, having only two extinguishers in total may not sufficiently cover larger performance spaces or more complex setups involving flame effects. Similarly, specifying extinguishers based on area or having three specifically on stage may not account for the entire venue's needs, thereby undermining overall safety. Therefore, the option indicating four or more extinguishers is the most comprehensive approach to fire safety in the context of using flame effects before an audience.