Up here it’s PVC/RNC with THWN, usually straight to the panel. Interior methods to get from a panel to a j-box is MC most of the time, to maintain an insulated green ground conductor. I say ‘most’ because I hear that NMC is installed in some towns.
The debate for the NMC inside is that it is approved, as the location is dry, and the change over to THWN in a j-box inside the structure is compliant.
