The Figure 2 shows two alternatives a and b for grounding an

The Figure 2 shows two alternatives (a) and (b) for grounding an electrical system. Determine the correct alternative and explain your selection. Figure 2: Grounding and switching connections the grounded conductor has a switch and the switch is located in the ungrounded conductor

Solution

Alternative (b) is preferrable. Since in connection a) switch is provided in grounded cable hence even if the switch is open condition supply voltage appears at the load which causes the electric shock to the touched bodies. this wil not happens in b) since the switch is provided in ungrounded cable.