by jandmz » Thu Oct 16, 2014 6:54 pm
In a panelboard, a 120 volt circuit is connected between the hot lead of one leg and a neutral that is at zero (or ground) potential. Hooking between the two hot legs of the service drop gives you the 220 V circuit. The 220 V cooktop is designed to be connected to the two hot legs. When you connect it to a 120V circuit, the grounded neutral is connected to devices that are not designed to be grounded, so you end up with stray currents running through parts of the device that are not intended to be current carrying. I would not recommend using it that way. It could be a shock hazard.
Another post recommended installing 120V hotplate components. That may be safer, if you know what you are doing, and if you make sure to wire it so that the parts that are intended to be "dead metal" are bonded in such a way that they remain at 0 potential.
Otherwise, I would recommend sticking with the propane stove.