One of the important changes between the 2011 and 2014 NEC for solar systems using microinverters was the addition of permission to use TC-ER tray cable for inverter output circuits under certain circumstances [NEC 2014 690.31(D)].
This transition has raised the question under what, if any, circumstances can TC-ER cable be used for inverter output circuits per the 2017 and 2020 NEC?
