I've always found this fascinating about Canada and the US. Both legs are +/- 120V potential to ground, and 240V between them. Here in Australia, everything in my house is 230V between active(hot) and neutral, both for plug in appliances and hard wired stuff like my heat pump (We call it a reverse cycle air conditioner here). Almost every house I've ever lived in has had one.
My old resistive clothes dryer just plugged into a standard 10A outlet like everything else. My current heat pump dryer uses 1/5 the energy though and has already paid for the extra purchase cost over the past three years.
We do have 15, 20, and 25A sockets, but these (especially the latter two) are quite uncommon (in the home) and most appliances which require more than 10A are hardwired on dedicated circuits such as for ovens, cooktops and ranges. Our typical clothes dryers just plug in though, with hardwired mainly found in laundromats and other commercial spaces.