How does cable size affect the transformer?
Just like water through a pipe, the larger the cable (number of copper strands), the greater the flow of electricity. If your cable is not rated properly, the transformer will not perform efficiently. Here is a basic guideline: 12/2 cable is rated at 16 amps or 192 watts, 10/2 cable is rated at 24 amps or 288 watts, and 8/2 cable is rated at 32 amps or 384 watts. Do not exceed the rating of the cable.