Now I'm getting it why no one else has much experience on these 2-pole 240v GFCI breakers. Because you only use it on tubs and spas.
It doesn't have any EGC (Equipment Grounding Conductor). All appliances don't have EGC.
Notice the flooring below. It's made of porcelain or marble. Are porcelain or marble insulator or can these conduct electricity (in ground fault)?
Tersh,
Ah. . . we do eat rice 
There are about 200 rice-based dishes and available in regular and ethnic restaurants in Southern Cal. The Thai Khao Phat, Italian Rizzoto, Indian Bhaat, the Spanish Paella and of course the Philippine Congee. A real tasty, watery dish with the look of wheat cereal floating in milk. But the congee doesn't have milk. . .it is watery though. :)
And we grow rice in California, Texas and Louisiana.
Now back to the topic.
If neither of the secondary wire is grounded (aka floating), there would be no stray current to ground. . .and you or your mama can touch either of the line all day long and no one will get shocked.
We'll keep this simple without referring to capacitive or inductive coupling flubdub.
To demonstrate this “floating” lines—look at those (birds) crows especially-- perched in a single file along high voltage lines that look like they are conversing and having a good time and planning for the next murder. (murder is the term for a gathering of crows). So, no implied maleficence here. As long as they're in contact with only one wire they are safe. You will also wonder why all of them are facing one direction—but that is not important for now. LOL
Ungrounded system is totally accepted wiring practice. In some installations, there is no other option. If you have ever worked as a shipboard electrician you will notice that none of its power system is grounded or connected to the hull.
If no conductor is grounded (as in neutral ) having a ground fault on one hot leg will not cause a breaker to trip and equipment will keep operating. Ask a friend who worked in the NAVY who is an electrician (not those guys guiding those F-35s landing on the deck or he'll tell you “get out of my way smart a**.”
The philosophy behind the idea of ungrounded system that was decided upon by the Marine Architect / Engineer lies on the priority of keeping the seagoing vessel afloat.
Keeping the vessel above water that is miles away from land takes priority above everything else. Safety of the personnel and keeping them from the hazard of electricution has less importance in contrary to NEC. As far as the designing marine engineer is concerned, you can sail away with your NEC until you disappear into the horizon.
They don't need NEC at sea.
Click on this, if your machine doesn't make the link try copying it to your search engine.
https://www.brighthubengineering.com/marine-engines-machinery/38231-electrical-grounding-on-ships/
I'm not saying human life is not important on a ship. . . so, hold your guillotine for a minute.
The complexity of modern guidance electronic system is mind-boggling. Communication is crucial along with the power sources and other equipment that keep the vessel afloat.
Now, someone might ask—how does the ship commiserate with the ungrounded rice cooker.
Well...the priority of the shipbuilder and the homeowner lie on each other's judgment that would provide the most reward.
The shipbuilder would be able to save the ship while the homeowner would not have to worry about GFCI— and cook as many bowls of rice as he can without having to worry getting shocked.
The prevailing syllogism is: if the ship sinks all souls aboard would perish. (Barring those who are able to grab a dinghy.)
So, its better to save the ship than losing someone getting fried because of carelessness, stupidity or ignorance.
In addition. . . . most modern home appliances that have heating element don't need grounding. It doesn't matter whether they are 230 volts or 120 volts.
The old-school heater designs that have those exposed nichrome heating elements are suspended with stand-off and mica to separate the element from the metal case. As the nichrome wire stretches when heated (as most metals do) they tend to get dislodged from its support that could either short out or make contact with the case. This is when you need grounding.
However, the modern nichrome alloy heating elements are imbedded in ceramics or the other design where the heater resides in a quartz envelope. No exposed live parts. So, no need for grounding either.
The new rice cookers are made this way too.
Think of the quartz lamp. You touch the bulb and you don't shocked. Ceramics and quartz have high melting point and perfect insulators.
Those 230 volt 2P GFI in US households are usually built-in to the appliance male plug. Most hairdryers have them too. But you can buy the 230 volt 2P CB at HD. Since most of those previously occupied homes have shared neutral-- it becomes problematic when you use a 230 volt 2P GFI breaker. It needs a dedicated neutral (white) from the panel to the outlet.
The plug-installed GFI is the best alternative. This is common in those thru-the-wall room airconditioner that is over 12000BTU. They are not suitable to be plugged-in with other “garden variety” appliances that are protected by 20 A 1P CB.
Because of the higher power demand, they need 230 volts power. You would still need a dedicated 230 volts 2P branch circuit though.
Have a happy rice cooking.
