A/A Fuel GTX
Senior Member
- Location
- WI & AZ
- Occupation
- Electrician
What MINIMUM size copper conductor type THW is required for a feeder circuit that is providing 3 phase, 480V power to a 10 HP and a 5 HP wound rotor, motor load. I figured 14A * 1.25 =17.50A for the 10HP and 7.6A for the 5HP which equals a total load of 25.10A. Used 430.24 for the calcs. Went to 310.16 and looked in the 75C column and chose a #10 conductor. Wrong according to them. How did I miss this?
Choices
1. #8
2. #10
3. #12
4. #14
Choices
1. #8
2. #10
3. #12
4. #14