PV conductor ampacity corrections are required when ambient temperatures exceed ___°F.

PV conductor ampacity corrections are required when ambient temperatures exceed ___°F.

• A. 71
• B. 86
• C. 78
• D. 83

Answer: (B)

When sizing conductors, the ampacity is established at a standard ambient temperature of 30°C (86°F). Once the ambient temperature rises above that level, you must apply temperature correction factors to derate the conductor’s ampacity. In PV installations, heat from sun exposure makes ambient temperatures frequently exceed this threshold, so corrections are needed starting at 86°F. Temperatures below 86°F don’t trigger these corrections, which is why the other options don’t apply.

When sizing conductors, the ampacity is established at a standard ambient temperature of 30°C (86°F). Once the ambient temperature rises above that level, you must apply temperature correction factors to derate the conductor’s ampacity. In PV installations, heat from sun exposure makes ambient temperatures frequently exceed this threshold, so corrections are needed starting at 86°F. Temperatures below 86°F don’t trigger these corrections, which is why the other options don’t apply.