For (microseconds), you’d use adiabatic heating formula — but that’s not normal “cable calculation.”
You're likely asking about for a solid conductor (single solid metal wire), as opposed to stranded wire. cable calculations
[Design Current (Ib)] ──> [Rating Factors] ──> [Tabulated Current (It)] ──> [Voltage Drop Check] ──> [Short Circuit Check] Step 1: Determine the Design Current ( Ibcap I sub b cable calculations
Cables operating in harsh environments lose their ability to dissipate heat. You must adjust the tabulated current-carrying capacity ( Itcap I sub t ) using correction factors: cable calculations