What type of wire for small subpanel feeder?
I'm installing a small 30A subpanel in my basement to supply 4 15A 110VAC circuits. No special load on any of them, can lights and general purpose receptacles. For the run from the main service panel, to the sub, can I use NM cable? Or does it need to be a "heavier" grade, like AC or MC, or perhaps THHN inside EMT? The feeder will be through studs/along joists, behind drywall, in a single-family residential setting. Not sure of the exact length, but it will be less than 25 feet in the absolute worst case.
Also, am I correct in reasoning that this panel will not need a local disconnect, due to the low ampacity and number of circuits?