Always consult the current edition of AS/NZS 3000 directly. This review is for educational guidance – local supply authority requirements may impose additional constraints (e.g., Western Australia’s “WA Amendment”). When in doubt, consult a practicing electrical engineer or licensed electrician.
Table 1 identifies the maximum temperature for various insulation types. as3000 current-carrying capacity table
(Nominal Current): The rating of the protective device (e.g., circuit breaker or fuse). IZcap I sub cap Z Always consult the current edition of AS/NZS 3000 directly
(Design Current): The maximum demand or expected load current of the circuit. INcap I sub cap N as3000 current-carrying capacity table