For three-phase AC circuits where the line-to-neutral voltage is known, the formula to convert watts to amps is: I (A) = P (W) V L-N (V) × PF × 3. The current I in amps is equal to the power P in watts divided by the product of line-to-neutral voltage V in volts, the power factor PF, and 3. This formula calculates the current for all three Cause: Smart-UPS RT units designed for 208v/240v environments have unbalanced 3 wire outputs and require a transformer to supply 120v loads. Resolution: The 208V/240V Smart-UPS RT is a single phase UPS with a 3 wire unbalanced output. They require 2 hots and a ground on the input, and 2 hots and a ground on the output. They do not use a neutral. If you plug in a 240 motor into a 120 circuit it will draw half the current and in turn, half the power. The table in 430.248 is correct IF the motor was wired for the correct current. Another way to look at this is to measure the resistance of the motor coil. Say the motor is wired for 240 volts and has a resistance of 40 ohms. Aug 26, 2012. #7. No, you'd still take as much as each breaker can handle. 2 * 15A * 120V = 3600W. Efficiency losses would mean you could probably output 3 kW. But of course, you could combine other inputs without worrying about phases and the like. For instance: 2 * 15A * 240V = 7200 W. 6,536. Jun 13, 2014. #11. camjerlams said: Hi, I scored an American 110V Dremel 4000 (power drill) but live in Australia with 240V outlets. I realise that a step down transformer would do the job but I want to keep it nice and portable. The drill specifically says 110V, 50-60Hz. Not 110-240v like some appliances. A hot-neutral reversal will supply the 208/240V relay with 120V. It will make an angry buzzing noise but won’t close. Two hot-neutral reversals will supply it with 0 volts. I found a Square D 50SV1A step-down transformer which will convert the 240v to 120v and provide the needed neutral. I am going to supply the transformer the 240v using a 2-pole 15amp breaker. I need to bond the ground lug in the transformer to the ground in the sub-panel. In addition, I also need to bond the neutral leg from the transformer to Sep 25, 2005. #1. I bought a 2200 watt surge power 120/240 v generator not knowing that the full amperage of the generator (15amp) was not availible in 120v. Only 7.5 is availible, albeit you have two 7.5 amp circuits availible if you use one half of the 240 four prong outlet. I would like to convert this generator to 120v only by combining the cS7SVtX.

how to convert 240v to 120v