Is the statement true that ampacities for conductors rated 0 to 2,000 volts can be adjusted for temperature ratings?

The statement about adjusting ampacities for conductors rated 0 to 2,000 volts based on temperature ratings is indeed true. Ampacity, which refers to the maximum amount of electric current a conductor or device can carry before sustaining immediate or progressive deterioration, is influenced by the temperature rating of the conductors.

Conductor specifications provide certain ampacity values based on standard temperature limits, typically assuming a particular ambient temperature. If the ambient temperature is higher than the standard or if the conductors are insulated with materials that have different temperature ratings, adjustments must be made. These adjustments ensure that the conductors operate safely within their thermal limits to prevent overheating and potential failure.

It's essential to follow appropriate guidelines and standards, such as those outlined in the National Electrical Code (NEC), which provides tables and methodologies to adjust the ampacity based on temperature. By recognizing these adjustments, electrical engineers and technicians can ensure the safety, efficiency, and longevity of electrical installations.