What is the ampacity for a 3-conductor 8 AWG copper Type MC cable installed in an ambient temperature of 96°F?

To determine the correct ampacity for a 3-conductor 8 AWG copper Type MC cable in an ambient temperature of 96°F, it's essential to refer to the National Electrical Code (NEC) tables that specify the ampacity for different wire sizes and types under various conditions.

For 8 AWG copper conductors, the standard ampacity under normal conditions (typically around 30°C or 86°F) according to NEC Table 310.16 is 50 amps. However, when the installation environment's temperature exceeds the reference temperature, ampacity may need to be derated.

At 96°F, which is about 10°F (approximately 5.5°C) warmer than the standard, the effect of temperature on the ampacity must be considered. For copper conductors, the adjustment is minimal up to 100°F, and in many cases, the ampacity remains the same or only slightly reduced. Thus, 50 amps is still a valid and safe ampacity for 8 AWG copper conductors installed at 96°F.

It’s important to note that the ampacity could be lower if additional factors, such as bundling wires or conduits with low airflow, were applied, but for a straightforward case