1.For 12 ft of NM cable, how close must supports be to boxes?
1.对于一段长12英尺的NM电缆,其支撑点距离接线盒必须在多近的范围内?
2.Two or more grounding electrodes that are bonded together are considered:
2.两个或多个相互连接(搭接)的接地电极,应被视为:
3.Within what distance from attic access must Romex be protected?
3.Romex电缆在距离阁楼检修口多远的范围内必须采取保护措施?
4.EMT must be supported within what distance of a box?
4.EMT导管距离接线盒多远的范围内必须设置支撑点?
5.Which installation detail violates code for ground rods?
5.下列哪项接地棒的安装细节违反了规范要求?
6.What is another name for a concrete-encased electrode?
6.混凝土包封电极的另一个名称是什么?
7.Ground rods should be spaced:
7.接地棒之间的间距应为:
8.If a grounding electrode exceeds ___ resistance, add another electrode:
8.如果接地电极的电阻值超过 ___ 欧姆,则必须增设另一个电极:
9.At what voltage level is guarding of live electrical parts required?
9.当电压达到何种水平时,必须对带电电气部件采取防护措施?
10.Where is the service entrance cable bonded?
10.进户电缆(Service entrance cable)应在何处进行搭接?