According to NEC Article 100, which temperature rating column should be referenced when using a 75°C conductor with equipment marked for 60°C?

In this scenario, when dealing with the temperature ratings for conductors and equipment, it is essential to reference the lowest temperature rating specified. The equipment is marked for 60°C, which means that it is designed to operate safely at that temperature. Even though the conductor is rated for 75°C, it is crucial to adhere to the equipment rating to ensure safety and compliance.

This is aligned with the National Electrical Code (NEC) principles that prioritize the lowest rating to maintain the integrity of the installation. Using a conductor with a higher temperature rating than the equipment can lead to potential safety hazards since the equipment may not be capable of handling the heat generated by the conductor operating at a higher temperature. Therefore, the correct approach is to reference the 60°C column to ensure compatibility and safety in the electrical system.