1.For a 480Y/277V system, grounding is done at:
1.对于 480Y/277V 系统，接地通常设置在：
2.Identify this electrical symbol:
2.识别此电气符号：
3.What does this symbol represent?
3.此符号代表什么？
4.The symbol shown corresponds to which switch type?
4.图中所示符号对应哪种开关类型？
5.Identify the switch represented by the diagram.
5.识别图中所示的开关类型。
6.A 60×80 ft store with 60 ft of display windows requires how many 20A circuits minimum?
6.一家面积为 60×80 英尺、拥有 60 英尺长展示橱窗的商店，至少需要多少个 20A 电路？
7.What does the term Pmax stand for?
7.术语 Pmax 代表什么？
8.What is the minimum number of branch circuits required for a kitchen?
8.厨房所需的支路（branch circuits）最少数量是多少？
9.Which NEC article governs grounding requirements?
9.NEC（美国国家电气规范）的哪一部分管辖光伏系统？
10.What is an enclosure with no exposed live parts and a flat front cover called?
10.具有平坦前盖且无裸露带电部件的外壳被称为：
