Which time?
In the original 1897, ampacities were listed in a table titled Rule 16, titled "Table of Carrying Capacity of Wires". 14, 12 and 10 had ampacities of 12, 17 and 24 for rubber insulation, 16, 23, and 32 for other insulations (those were your only two choices then!).
In the 1911 NEC it was called Rule 18 and was re-titled as "Allowable Carrying Capacities of Conductors."
In 1920, it became Table 1 of Rule 18.
In 1923, it was Table I to Rule 610. This was the first of three major renumberings of the NEC
In 1930 NEC, it was relocated as Table 1 of Rule 618.
In 1937, it was moved to the back of the book and became Table 1, Chapter 9. This was the second of three major renumberings of the NEC
In 1940 Table 1 was moved further back to Chapter 10.
In '59 it was relocated again and became Table 310-12. This was the third of three major renumberings of the NEC.
In '65, the Table was renumbered 310-15.
In 1978, it was moved to T310-16.
In 2011, it was renumbered to 310.15(B)(16).
In the 2020, it went back to T310.16.
Now you know.
