Under which of the following conditions do the ampacities specified in Table 310.16 apply?

The ampacities specified in Table 310.16 apply under specific conditions that include all listed scenarios.

Firstly, the conductors must be rated from 0 V through 2,000 V, which aligns with the table’s specifications and guidelines designed for typical low-voltage conductors used in residential and commercial applications.

Secondly, the table covers conductors that have temperature ratings of 60°C (140°F), 75°C (167°F), or 90°C (194°F). These temperature ratings are critical because they determine how much current a conductor can safely carry without overheating.

Lastly, it is essential that there are not more than three current-carrying conductors in a raceway or cable grouping, as increasing the number of conductors impacts heat dissipation and potentially raises the risk of overheating.

Thus, all these conditions combine to form the basis under which the ampacities in Table 310.16 are considered valid and safe for use, making the correct answer encompass all of the above stipulations. It is crucial for anyone working with electrical installations to be aware of these requirements to ensure safety and compliance with electrical codes.