What is the maximum allowable temperature for combustible materials near luminaires?

The maximum allowable temperature for combustible materials near luminaires is set to prevent fire hazards and ensure safety in electrical installations. The reference point of 90 degrees Celsius is specified in various electrical safety codes and standards to indicate the upper limit for surface temperatures that combustible materials can safely tolerate when in close proximity to lighting fixtures.

When luminaires produce heat during operation, they can elevate the temperature of surrounding materials. If this temperature exceeds 90 degrees Celsius, there is a significant risk of igniting those materials, potentially leading to a fire. This limit provides a safety margin, allowing for some fluctuation in operational conditions while still maintaining an essential level of safety.

Understanding these temperature limits is crucial for electricians and other professionals to ensure installations are compliant with safety regulations, protecting both property and individuals from fire hazards associated with electrical equipment.