A code provision states that no thermal insulation may be installed within how many inches of a recessed fixture?

The code provision specifies that no thermal insulation should be installed within three inches of a recessed fixture to ensure safety and functionality. This distance is crucial because recessed fixtures can generate heat during operation. If insulation is placed too close, it can lead to overheating, which poses a fire hazard or could damage the fixture itself.

Recessed lighting is designed to work optimally with adequate airflow surrounding it to dissipate heat. Maintaining a clearance of three inches helps mitigate the risk of thermal buildup, allowing the fixture to operate safely without the risk of igniting surrounding materials. This provision reflects standard practices in electrical safety and building codes to protect both the lighting installations and the structure of the building.