Your idea of splitting 240V into two 120V half-circuits is called an MWBC and it's too difficult to do given current codes. But it's just as easy to wire two full circuits. (you couldn't have used existing /2 cable for an MWBC, so you'd have to pull a /3; well then pull a /2/2 (4+ground) or dual /2's and done. For a 120V tub, only lines 1, neutral and ground are active. Thus, to convert the tub from 240V to 120V, unscrew line 1 and neutral wire from their respective posts. Then, attach line 1 to the post vacated by unscrewing of neutral wire. Keep the neutral wire disconnected. Reattach the panel cover and then reconnect the hot tub to power source. After this conversion the heater will run at 240V and the pump will run at 120V.© Balboa Water Group. After this conversion the heater will run at 240V and the pump will run at 120V.© Balboa The SU6000XFMR2U step-down isolation transformer converts 208V or 240V input from any generator, utility or UPS high-voltage source to 120V low-voltage output. 208V or 240V 30A input connection supported via hardware or included L6-30P input plug. Eight 5-15/20R and four 5-15R output receptacles accommodate 5-15P and 5-20P equipment plugs. Built-in L6-30R outlet supports one high-voltage L6 Hence, a step down & step up voltage converter is necessary while you travel among different countries, or you buy an UK appliance but work on US domestic power grid. A voltage converter is built-in transformer for converting - 110v to 220v, - 120v to 240v and - 230v to 110v, - 220v to 120v etc. You may not be able to find a 220 to 110 adapter. Instead, you may find a 240 to 120 one or even a 250 to 125. Don't worry. Any of them will work. Electrical manufacturers and electricians use the different numbers because the standard voltage coming into residential panels from the power lines can vary. If you have a 1000W electrical appliance connected to a 240V circuit, it will be drawing 4.17 amps. 1000W ÷ 240V = 4.17A. How many amps is 1500 watts at 120 volts? If you have a 1500W electrical appliance on a 120V circuit, it will be drawing 12.5 amps. 1500W ÷ 120V = 12.5A. Show activity on this post. If you need 3-phase, 208V for just one 3-phase motor, you can buy a variable frequency drive (VFD) that will accept 120 V, 1-phase input and provide 208V, 3-phase output and control the output voltage and frequency to provide variable speed. It is simple in the sense that you just buy a single product and connect it. 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 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. vqd4mEO.