Although the requirements for limiting the ampacities of conductors to that of the terminal temperature ratings found in NEC Table 310.15(B)(16) has been clear in Sec. 110.14(C)(1) for many years ...
A. To prevent unbalanced current in the parallel conductors due to inductive reactance, all circuit conductors of a parallel set [Sec. 310.10(H)] must be bundled together and secured to prevent ...