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The header for the LG 18,000 BTU 1,000 Sq. Ft. 230V Smart Window Air Conditioner - White, Model # LW1822IVSM identifies this unit as a 230V window air conditioner. Nearly all homes in America have 240V alternating current lines at the service entrance to the household as well as at select locations within the home. The reason it’s 240V is because that’s the power line that has been standardized over here. Most appliances will accept 220-240V however. Prior to the residence entry, the line transformer secondaries are center-trapped to provide split-phase 240V on two hot legs (1 and 2) and neutral at the center tap (which is referenced to Earth at the breaker box). For most home outlets, either leg 1 or leg 2 is used with the neutral line to provide 120 V alternating current to power small appliances with a plug-in cord. In this sort of setup, there won’t be any outlet above 120 V. For larger appliances, as in the case of the aforementioned oven and laundry machine, they will use leg 1 to leg 2 voltage, which is a straight shot of 240V line to line out of special outlets, or otherwise especially hardwired to specific areas of the home. Your 220V outlet has a voltage rating of 208-240 volts. 220V, 230V, and 240V are interchangeable terms for the same system voltage level in North America. They are all compatible with each other, meaning you can plug a 230V appliance into a 220V outlet without worrying that you are creating a potential problem...^Ivan.
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