I worked on a volunteer project back in Md that was bringing some WWII vintage government housing up to the 75 NEC (A "Habitat" sort of thing). They had one receptacle in each room and an overhead light. There was only one receptacle serving the countertop. These had oil heat, hot water and a propane range. It was also 30a/240v with 4 fuses.
We took it up to 100a, put in the required receptacles and electric hot water. This gave them the breathing room for AC so we put in a couple dedicated circuits for window shakers. The heat stayed oil and the range was still propane.
