Question: are dishwashers plugged in or hardwired?
Answer: Dishwashers can be either hardwired, or cord-and-plug connected. Check the owners manual of the unit you have, but in most cases the decision is left to the installer. In newer homes you'll commonly find a 125V NEMA 5-15R receptacle supplied by a 20 ampere circuit, used to supply a dishwasher and disposer.