What is the insulation temperature rating required for conductors close to a ballast?

The insulation temperature rating required for conductors close to a ballast is 90°C. This is based on the operating conditions encountered near ballasts, particularly those used for fluorescent lighting which can generate significant heat. Conductors must be capable of withstanding elevated temperatures without degrading their insulating properties or becoming unsafe.

The 90°C rating ensures that the insulation can handle the heat generated by electromagnetic ballasts safely while maintaining performance and longevity. Conductors that do not meet this temperature rating might suffer from insulation failure, leading to short circuits and potentially hazardous situations.

Although other temperature ratings are established for different applications, 90°C is specifically designated for usage around ballasts in accordance with the National Electrical Code (NEC) and local regulations. This temperature compatibility is essential, particularly in retrofit situations where older systems are upgraded to new lighting technologies, ensuring safety and efficiency.