Recessed ceiling lights should be rated ____ if installed against insulation.

• A. GC
• B. CC
• C. EC
• D. IC

Answer: (D)

Recessed ceiling lights that are installed against insulation need to be rated IC, which stands for "Insulation Contact." This rating indicates that the fixture has been tested and approved for direct contact with insulation materials. Using IC-rated fixtures allows for safe installation in spaces where insulation might be in close proximity, preventing potential overheating and reducing fire risk.

In contrast, non-IC rated fixtures can generate significant heat during operation, which could cause the insulation to become a fire hazard. Therefore, when installing recessed ceiling lights in areas where insulation is present, it is crucial to use those that are IC-rated to ensure compliance with safety standards and to provide adequate protection against fire hazards.