You would have a code violation, only a 50 amp/250V plug would fit into a 50 amp/250V receptacle. You would not have proper overload protection, the load could (worst case) call for more amps than it is rated for and catch fire before the breaker tripped.
Absoluteyl not.
yes
If it is a 30 amp breaker then it is a 240 volt outlet.
If the plug fits you are good to go. The typical range of residential voltage is from 110 to 125 VAC. You are fine within this range.
Yes is ok as long as you increase the size of the plug .I use dryer plugs( 30 amp )all the time on equipment that came with smaller plugs (20 amp).
15 amp outlet on a 20 amp circuit.
Absoluteyl not.
yes
If it is a 30 amp breaker then it is a 240 volt outlet.
yes
If the plug fits you are good to go. The typical range of residential voltage is from 110 to 125 VAC. You are fine within this range.
No you can not you will need to replace the plug with a 4 prong the same as the style of your oven and change your breaker to the correct Amp for your style of 4 prong plug
If you are asking this question I assume that the outlet/plug is hot enough to be noticeable and it is likely a problem you should address immediately. As a start remove the plug from outlet and see if the outlet is still hot. If so, turn off the breaker controlling the outlet. Remove outlet from box and see if there is evidence of a burned or loose wire. If there are no obvious problems and the outlet is still hot with nothing plugged in, call an electrician; or if you know how replace the outlet with a 20 amp outlet. Otherwise it could be a faulty plug which you should replace. The only other thing that might be wrong is a faulty breaker that isn't tripping on an over current condition and the connected device is drawing too much current.
Yes is ok as long as you increase the size of the plug .I use dryer plugs( 30 amp )all the time on equipment that came with smaller plugs (20 amp).
You can use the wire rated for 20 amps on a 15 amp receptacle but you can not use a 20 amp fuse on any device rated at 15 amps. This is a tricky part of the code about receptacle outlets, You can use a 15 amp duplex outlet on a 20 amp circuit. (duplex outlet two devices can plug in) If it is a single outlet then the outlet must be rated 20 amp. NEC table210.21(B)(3). ============ A 15 amp duplex receptacle can be wired to a 20 amp rated circuit. This means the breaker OR fuse protecting the circuit can be rated 20 amps if the wire is also rated at 20 amps (12 AWG). --Sparkfighter
A 15 amp 125 volt outlet is a household outlet.
If it blows every time you plug in the same component, the component is bad.