Absolutely have him/her show calculations and sign/seal them.
But, what am I missing? Table 310-16 shows 4/0 CU in the 75 degree column to have an ampacity of 230A. What is the issue with 225A CB serving a 230A conductor? Is it 100% rated breaker or something else? Maybe aluminum?
[This message has been edited by Ron (edited 07-07-2003).]
