Which flame effect group is defined as an installation of flame effects with a use permit duration longer than 180 days?

• A. Group 4 flame effect
• B. Group 5 flame effect
• C. Group 6 flame effect
• D. Group 7 flame effect

Answer: (D)

Flame effect groups are defined by how long a flame installation is allowed to operate under a use permit. The longer the permit duration, the higher the group number because more stringent safety planning, monitoring, and regulatory oversight are required. When the use permit lasts longer than 180 days, the installation falls into the long-term category, which is Group 7. This designation reflects the need for sustained fire safety measures, ongoing supervision, and coordination with authorities, compared to shorter-duration groups designed for temporary setups. So the correct choice is Group 7.