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Hi, Jul. Thanks for your question about the LG Washer (WM4000HWA) model and the difference between 3- and 4-prong cords. The 4-prong cord is beneficial as it has separate grounding and neutral wires, reducing electrical shock risks and ensuring proper grounding, which is crucial for modern washers and dryers. In contrast, 3-prong cords, common in older homes (built before 1996), have two "hot" wires and a combined neutral/ground wire. Choosing between a 3-prong or 4-prong cord depends on your home’s electrical outlet, not the dryer. This unit is compatible with both, but cords aren't included due to varying home wiring, so select the right one for your outlet. For more product information, visit https://www.lg.com/us/washers-dryers/lg-wm4000hwa-front-load-washer. If you need further assistance, message us on social media @LGUSSupport. We’re here to help. ^Juvy
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