Recessed non-Type IC lighting fixtures must maintain a clearance of at least what measurement from combustible material?

The requirement for recessed non-Type IC lighting fixtures to maintain a clearance of at least 1/2" from combustible materials is based on safety standards to prevent fire hazards. Type IC fixtures are designed for direct contact with insulation, whereas non-Type IC fixtures are not. Therefore, they must have a sufficient distance from combustible materials to ensure that heat generated by the fixture does not ignite any flammable substances that may be nearby.

By requiring a minimum clearance of 1/2", this standard provides a safety buffer that helps reduce the risk of overheating and potential fires, as it allows for better airflow and cooling around the fixture. This distance aligns with recommendations from the National Electrical Code (NEC) and related safety regulations, ensuring that installation practices prioritize safety and compliance.