@jerv Exactly. Most products sold i the US have polarized plugs. The neutral side, white wire, goes to the larger blade, while the hot side goes to the black wire on the smaller blade. Products made for use in other countries do not always have this arrangement. For example, Japan does not use polarized plugs. The appliances have isolated cases and plugs that are ambidextrous – both blades are the same size.
When I moved in to my older house I checked all the outlets and out of about 50, two were wired incorrectly. Hot and neutral were reversed. I quickly fixed it.