Hey SpecialK2. The adaptor in question is meant for setting up a 15A 110V receptacle - this adaptor is not meant for use on 220V. Plugging it in to an existing 30A, 4-prong 220V dryer receptacle (as it is intended) connects to the neutral conductor and to one of the lines (hot/power conductor), as well as the ground. Ideally the breaker would be changed in your panel to serve the 15A that the plug is rated for. So, in short, if your dryer requires a 15A 110V supply circuit, then this plug will work. If your dryer has a 220V plug end, then this receptacle is not for you. If your dryer is what you are trying to convert (as it seems your question indicates), then you may have to consult the manufacturer of the product. In my opinion, the best option is to find out what the requirements are (i.e., Amperage and voltage requirements) and buy the appropriate receptacle.

It should if it had a circuit breaker built in. But it doesn’t. Since the range breaker in your panel is probably 30 amps an overcurrent would probably fry the the stove along with the eggs and maybe you too before it threw. Change out the dual 30 amp breaker in the panel for a single 20 amp. Then wire nut smaller gauge wire to one of the existing 8 ga. cable hot conductor  and cap off the third now unused hot conductor. The smaller gauge wire will allow you to fit into the 110 v receptacle and breaker. Obviously you will continue to use the the neutral and grounding conductors. The smaller wire will fit in the breaker and new 110 volt receptacle. There may be some issues about bonding dissimilar metals together but not sure about that. You may need to use anti-oxidant compound on the bonded conductors. Another way to do it is install a small 30 amp subpanel behind the stove using the existing 30 amp circuit. Then you can snap in a 110 V breaker for your stove circuit and you’re done. AND you and still have some capacity in the panel if you wanted to add some new receptacle or lighting circuits.

It is garbage. No serviceable parts