When selecting an electrical conductor that operates at an elevated temperature, what factor is required for its determination?

The correct factor to consider when selecting an electrical conductor that operates at elevated temperatures is related to the maximum allowable run length, which is essential in determining the conductor's performance and safety. When conductors carry current, they generate heat, and the amount of heat produced increases with the length of the run.

Longer runs can lead to higher resistance, which further increases heat generation. Therefore, the maximum allowable run length provides critical information on how far the conductor can be safely run without exceeding temperature ratings or causing excessive voltage drop. This understanding helps ensure that the conductor remains within safe operating temperatures under load conditions.

By taking into account the maximum allowable run length, you can ensure that the conductor is adequately sized and appropriately insulated to handle the expected current over that distance without reaching temperatures that could compromise safety or equipment integrity. Understanding this relationship is fundamental for proper electrical system design and ensures compliance with safety standards.