14 gauge wire is smaller and is only good for 15amps of load. 12 gauge wire is a little bigger and is good for 20 amps of load, that is best case. there are many other factors that apply such as length of wire run, how long the power is applied, how many conductors are parrellel to each other etc.
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Both 12-2 and 14-2 wire have 2 wires in a single cord. Neither contains a ground wire. Size 12 wire is a larger wire than size 14 wire. Size 12 wire can carry more amperage without getting hot and burning up. They would not be used for house wiring or machinery since they do not have a ground wire.
2.4
Difference means minus the two numbersie. 29 - 14 = 15This means that the difference is 15.
Area of a 14 inch pizza = 43.98in2. Area of a 12 inch pizza = 37.70in2. Difference between the two = 6.28in2.
14 and 2