I am wiring into a 3 phase 208v busbar. I want to split each phase to 120v with the neutral. I have no "wild leg". I am using 10 ga stranded copper wire for the 3 hots and the neutral. My loads consist of 20A on L1, 20A on L2, and 10A on L3. I want to know what the current will be on the neutral. If I can use the single existing 10 ga wire for each leg (30 amp capacity)? If I need to worry about harmonics?
2007-01-04 14:55:15 · 2 answers · asked by inverse_blue 1 in Science & Mathematics ➔ Engineering
Since each phase is 120 degrees apart, there will never be more than 20 amps in the neutral, and that would only occur if one leg was drawing 20 amps and the other 2 zero. Your 10ga is fine, whether it be the single neutral of a 3-ph load, or if it's 3 separate loads, each with it's own 10 ga neutral. (3 loads, 3 neutrals, right?)
Harmonics? Phttt..... what harmonics?
Clear?
2007-01-04 15:30:24 · answer #1 · answered by Gary H 6 · 0⤊ 0⤋
USE 6 OR 8
2007-01-04 22:57:40 · answer #2 · answered by buddy d 2 · 0⤊ 1⤋