Typically one.
No. A 20 amp breaker needs 12 gauge wire.
Sounds like a 240 volt sub panel feeding a well pump.
Yes, a 20 amp breaker requires AWG # 12 copper wire. A 15 amp breaker requires AWG # 14 copper wire.
A 20-amp outlet is the maximum amperage rating that can safely handle high-power appliances like air conditioners and refrigerators.
Check the MFG for the amps it uses, if it is suppose to be on a regular 20amp line, then replace the breaker with a 20amp breaker. With the 30amp breaker,it will work, but if there is a surge, you could send too much power to the appliance and fry it. Most refrigerators, are just on a regular 120v household outlet. Besides a 30amp breaker must have 10ga wire, if the wire is 12ga,it can not be attached to a 30amp breaker.
No, you should match the breaker size to the wire gauge. A 10-2 wire is typically rated for a 30 amp breaker. Using a 20 amp breaker on 10-2 wire could result in overheating and a potential fire hazard.
The minimum size wire a 20 amp breaker needs to be connected to is a #12 wire. The 15 is probably connected to a #14 right now which is only rated for 15 amps. Remember the breaker is sized to the wires ampacity not the load .
No. The amps must be 30 on each leg and the toggles must be rigged so that if one trips then both trip. It is best to buy the correct 230 V breaker at 30 amps.
All depends on how big your main breaker is and what size wire you are using,one 20 amp outlet needs #12 wire not more than 50feet away from main breaker
ITS SHOULN'T BE JUST A FUSE IT SHOULD HAVE A CIRCUIT BREAKER TOO. THE CIRCUIT BREAKER OPENS IF YOU HOLD THE SWITCH TOO LONG. ITS 20AMP ON MOST CARS THAT I WORKED ON. ITS IN THE FUSEPANEL ON MUSTANGS. GOOD LUCK PAUL G
Have an electrician wire you a proper line for the appliance. You were just kidding about the 100A, right? 10, or 20amp, not 100.
Assuming you are referring to the power supply failing in your 20A device, it could cause the 30A breaker protecting the receptacle to trip. It depends on the mode of failure. It is easy to imagine a condition where a short in the power supply could cause a current in excess of 30A to flow to the device and trip the breaker.