What type of flame effects might have restrictions under NFPA 160?

High-risk flame effects are subject to specific restrictions under NFPA 160 due to their potential hazards. These effects can involve significant fire and safety risks, especially in the presence of an audience. The standard outlines strict guidelines to ensure safety, which may include limitations on the types of fuels used, the placement of the flame effects, and the distance from the audience.

Low-risk effects generally have fewer restrictions, as they are less likely to pose significant dangers during performances. While NFPA 160 acknowledges that all types of effects may require some level of compliance with safety measures, the focus on high-risk effects stems from their greater potential to cause harm if not managed correctly. Thus, high-risk effects require careful consideration and adherence to specific standards.