GB 50054-2011 第6.2.3条
| **** | When the conductor cross-section of a distribution circuit is reduced for overload protection (e.g., the branch circuit from a hotel floor distribution board to guest rooms), an overload protection device shall be installed at the point where the conductor cross-section is reduced or at the branch point, and the rated current of this protection device shall not exceed the allowable current-carrying capacity of that circuit section. |