My father-in-law is a builder. He has put in 20 amp and 15 amp breakers, and ran 12-2 as the home runs to the switch's and the first plug to make them hot. He then ran 14-2 to feed the rest of the plugs, lights, and ceiling fans.

Is it okay that he used different gauge wires on the same circuit?

My father-in-law is a builder. He has put in 20 amp and 15 amp breakers, and ran 12-2 as the home runs to the switches and the first plug to make them hot. He then ran 14-2 to feed the rest of the plugs, lights, and ceiling fans.

Is it okay that he used different gauge wires on the same circuit?

My father-in-law is a builder, he has put in 20 amp and 15 amp breakers and ran 12-2 as the home runs to the switch's and the first plug to make them hot and ran 14-2 to feed the rest of the plugs and can lights and ceiling fans.

Is this fine?

My father-in-law is a builder. He has put in 20 amp and 15 amp breakers, and ran 12-2 as the home runs to the switch's and the first plug to make them hot. He then ran 14-2 to feed the rest of the plugs, lights, and ceiling fans.

Is it okay that he used different gauge wires on the same circuit?