Panel board 1(single phase)
- total wattage=17,000w @ 230V
- has 2.5Hp ACU (largest motor)
Please. Solve for.:
1. size of main feeder line
2. main breaker


Panel board 2(3phase)
- total wattage=10000w @ 230V
- has 2.5Hp ACU (largest motor)
Please. Solve for.:
1. size of main feeder line
2. main breaker



Combined panel board1 & 2 (single phase & 3phase)
1. size of main feeder line
2. main breaker

Can you explain your situation, such as, why do you plan to combine a 1 & 3 phase panel?

This is not recommended, unless this is a test question.