Wire size is rated by Amperes of current. You did not mention the wire size of the aluminum wire, so there is no way to answer your question.
The voltage rating is more a rating of how good the insulation around the wire is.
Use 15 amp breaker with 14 gage wire or 20 amp breaker with 12 gage wire. Either way will work just fine.
In the United States, if the wire is #8 copper or larger (smaller number) it will work fine on a 40 amp breaker. If the wire is #10 copper, there is something wrong with the breaker if it does not fit. Pull the breaker out of the panel and look into where the wire terminates to see why the #10 wire won't fit.
I have never seen a piece of aluminum that didn't work. Aluminum can be used for electric wire. But it's not desirable for that application, because of its high intrinsic resistivity, which means you lose too much of the electrical energy when it has to go through aluminum wire. The result is that the wire may get hot, and you'll pay the electric company for more energy than you were able to use for the purpose you needed it.
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.
If you connect the ground wire to the hot wire it will trip the breaker. If you get the white and black wires reversed it will still work but does not meet code.
No. You will need a 14/3 with Ground.
When compared by volume, copper is best, then aluminum and finally iron. When compared by weight, aluminum is better than copper. You have to compare by volume because aluminum is so much lighter than copper, an aluminum wire that weighed the same as a copper wire would be much bigger and harder to work with.
A wire carrying electricity to a load. The wire conducts the energy from a source to a device. That connection in a complete circuit does work.
how do i find a short in my head lights ,tail lights work but not my head lights
Answers for USA, Canada and countries using similar 60Hz mains supply.By stating that it is a double pole breaker it is presumed that the load device needs 240 volts to operate. Connect the black wire to one pole of the breaker. Apply black electricians tape to the white wire to identify it as a current carrying conductor. This wire is then terminated into the second pole of the breaker. The ground wire is terminated on the terminal ground strip in the back of the breaker panel. On the load end also identify the white wire with black tape before connecting it to the load. What this signifies to any one with electrical knowledge is that the white wire is not a neutral but carries load current.If you do any such work yourself, always turn off the power at the breaker box/fuse panel BEFORE you attempt to do any work AND always use a meter or voltage indicatorto insure the circuit is, in fact, de-energized.IF YOU NOT ALREADY SURE YOU CAN DO SOME ELECTRICAL WORKSAFELY AND COMPETENTLYREFER THIS WORK TO QUALIFIED PROFESSIONALS.
A circuit breaker protects the wires that the devices are connected to. If the devices that are connected to the circuit are 20 amps the wire size should be #12 wire fed from a 20 amp breaker. This breaker should not trip unless the circuit is overloaded or a fault occurs on the circuit. If the devices that are connected to the circuit are15 amps the wire size should be #14 wire fed from a15 amp breaker. This breaker should not trip unless the circuit is overloaded or a fault occurs on the circuit. Putting 20 amp sockets on this 15 amp circuit will work but the circuit is limited to the amount of load that can be plugged in. You will not get the full capacity of the 20 socket because the breaker will trip at 15 amps.
A 20 amp circuit with #12 gauge wire will work in any event but if the nameplate recommends a 15 amp circuit then #14 gauge wire on a 15 amp circuit is sufficient. In either case you will have a double pole breaker and your equipment may not require a neutral. Always run a grounding conductor.