"It might also have been a 3-phase 208/120 volt network system, where only two hots and a neutral are brought to each apartment. (Sometimes used in cities too, for single and multiple family homes--- requires the fifth jaw in the meter can.)"
We have this 208/120 on our main street, and 120/240 on the side streets, so we have to take care when working on homes or business near the main street network, but you keep saying you have 240, are you sure?
