Ampacity relates to the conductor's ability to carry current.

• A. Voltage
• B. Power
• C. Current carrying
• D. Resistance

Answer: (C)

Ampacity is the maximum current a conductor can carry continuously without overheating its insulation under specified conditions. This rating comes from how I^2R heating builds up as current flows, and how well the insulation and surrounding environment can dissipate that heat. So ampacity directly reflects the conductor’s safe current-carrying capability.

Voltage is about the potential difference that drives current, not how much current a wire can safely handle. Power depends on both voltage and current (P = VI), so it isn’t the rating that defines how much current a conductor can carry. Resistance determines how much current flows for a given voltage and also contributes to heating, but ampacity isn’t a measure of resistance itself—it’s a thermal safety limit for carrying current.