The carbon block consists of two electrodes spaced so that any voltage above the design level is arced from line to ground.
碳块中有两个彼此间隔的电极，任意高于设计标准的电压都可以跨过电线入地。
2
Also, confirm the land boundaries and whether outdoor structures, like portable sheds and above-ground pools, will be included before you sign on the dotted line.