Which temperature correction factor corresponds to the higher ambient temperature range for insulated conductors?

The temperature correction factor for insulated conductors is essential in ensuring that conductors operate safely and efficiently under varying ambient temperatures. When ambient temperatures rise above the standard reference temperature (usually around 30°C or 86°F), the current-carrying capacity of the conductors is affected.

In this context, the factor of 1.08 applies to higher ambient temperature ranges. It indicates that the conductor can safely carry 8% more current than it would at the standard temperature, accommodating the reduced cooling effect on conductors due to the elevated temperature. This higher factor helps to ensure that the insulation remains effective and that the conductors do not overheat, which could lead to safety hazards or operational failures.

The other options would generally apply to lower or different temperature ranges, reflecting that the current-carrying capacity must be adjusted downward to prevent overheating. Using the correct temperature correction factor is crucial for maintaining electrical safety and efficiency in installations subjected to higher ambient temperatures.