I am looking at 600-amp 120/208 3-phase panel fed with 2 sets of parallel 300 kcmil. The lugs they terminate to are 75C.
Table 310-16 ('99, please excuse the archaic reference)
| 75 C | 90 C |
300 kcmil | 285 amps | 320 amps|
350 kcmil | 310 amps | 350 amps|
Am I right to say that this panel should be fed from 350's because of the temp rating on the lugs?
So if my above suspicions are correct, can I fix it like this:
There is a J-box relatively close to the panel. Can I just remove the 300's back to the J-box and split bolt 350's from the panel to the j-box? I guess that is assuming the lugs on the other side are 90C rated, which come to think about is unlikely.
