Both say 120V. So I guess I could just swap out the plugs.... just looked like something was made to plug in to a converter or something along those lines...What voltage? For waterbeds, they may be low voltage connectors, not designed of household AC wall outlets. You need more information, what voltages doe the heaters operate at???
Makes sense. CheersI'm beginning to think that one plug is for a thermostat, the other is for power. You would need the right controller to use those plugs. One cannot just plug a heater into the wall without some "safety" device like a thermostat.
Wow that old huh!? lolThose remind me of some old vintage plugs used for appliances, The male (with round pins) was on the appliance, and the female was connected to a cord with conventional flat contacts. They were used on things like electric frying pans and such in the 40's and early 50's. Probably before that too.
Here is a link to a museum that shows several of the female plugs: https://www.plugsocketmuseum.nl/ApplConn_classic2.html