Yes, that is what he is telling you. For 120 volts you need a white (neutral) wire, a green (equipment ground) wire and a wire of some color other than green, white or grey for the "hot" conductor. For 240 volts only you need two wires with a color other than white, grey or green along with the green equipment ground.
We just recently remodel this unit and the contractors installed a 240v air conditioner where a 120v outlet is located. So I had to go to the breaker box and
The upshot is that 240V is a single source with a center-tap (giving 120V each direction of center. In fact, when Edison designed it, it was +120V DC and -120V DC. And had Edison won the War of the Currents, your idea would have worked. Here's the deal. Draw a 1.20 inch arrow on a sheet of paper. Remove the power cord by unscrewing the connections on the terminal block on the circuit board. Then remove the jumper wire from the "Red AC" section. Move the number 10 dipswitch down and that converts it to 240v. Your electrician will then bring in the neutral, 2 hot wires and a ground wire and you are good to go. BESTEK 2000W Travel Voltage Converter Power Step Down 240V to 120V Converter with 2.4A 2-Port USB Charging for Hair Dryer/Curling Iron/Coffee Machine/Phone Travel Adapter for Europe Countries (Black2) 1. 50+ bought in past month. $4699. Save 30% with coupon. FREE delivery Tue, Jan 9.
To determine the size of the transformer needed, follow the steps below: Note down the load voltage. Next, note down the load current. Multiply the voltage by the current. Divide the result by 1000. The result is the minimum kVA (kilovolt-amperes) for a single-phase transformer.
. 151 185 103 150 341 327 169 368 235

how to convert 240v to 120v