A subpanel is a panel fed from another panel.
Like in my old house I had a 200 A main panel, but a sub panel in my workshop. The physical size isn’t the determining factor. What makes a sub panel a subpanel is that there’s another breaker in the house which controls all power to it.
The 200A main panel (techincally service panel) fed a subpanel via a 60 AMP breaker. That subpanel had 4 other breakers.
Like in my old house I had a 200 A main panel, but a sub panel in my workshop. The physical size isn’t the determining factor. What makes a sub panel a subpanel is that there’s another breaker in the house which controls all power to it.
The 200A main panel (techincally service panel) fed a subpanel via a 60 AMP breaker. That subpanel had 4 other breakers.