If insulation is involved, what is the minimum clearance from a recessed light?

The correct choice is the minimum clearance required from a recessed light fixture when insulation is involved, which is typically three inches. This distance is important to ensure safety and prevent overheating. Recessed lights, when they operate, can generate significant heat. If insulation is placed too close to the fixture, it can inhibit the dissipation of this heat, potentially leading to insulation degradation and even fire hazards.

The National Electrical Code (NEC) stipulates this clearance to mitigate risks associated with enclosed spaces where heat buildup can occur. By maintaining this three-inch gap, you help ensure that the insulation allows for adequate airflow around the fixture, thereby lowering the risk of heat-related incidents.

The other choices, while they may suggest smaller clearances, do not align with the safety guidelines set forth in the NEC for recessed lighting installations. Following the three-inch clearance guideline is crucial for maintaining fire safety and compliance with building codes.