As we saw in Part 1, the correct sizing of conductors is more complicated than it appears. One of the reasons is the way temperature affects the resistance of a conductor. Higher temperatures mean less current-carrying capacity for a given size conductor. A conductor may have sufficient ampacity at one temperature, but at a higher temperature it just can’t take the heat.
We use ampacity tables to select the correct ampacity, but the ampacity tables are based on 86°F. What if y