Arizona Drivers Permit Practice Exam Guide

Which characteristic of a conductor determines its ampacity (the maximum current it can carry continuously)?

The color of the insulation The cross-sectional area (gauge) and temperature rating of its insulation The speed at which it transmits data The number of twists per foot

Correct Answer:

The cross-sectional area (gauge) and temperature rating of its insulation

Explanation:

Ampacity is determined by the physical size of the conductor (which dictates how much heat it generates) and the temperature rating of its insulation (how much heat it can withstand).

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