Discuss the role and location of the grounding bus.
What will be an ideal response?
The majority of the connections to ground are made in the low-voltage section. However, the electrician should be aware that a grounding bus usually runs the entire length of the unit substation. This bus provides the means for a positive ground connection between the compartments, as well as a convenient place to make other ground connections. Two types of grounding connections are of special interest. The system grounding connection is used to connect a phase or the neutral of the transformer secondary to ground. This grounding electrode conductor is sized according to NEC 250.66 and Table 250.66. The second grounding connection of special interest is the connection of all the incoming metal raceways to the grounding system.
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What will be an ideal response?
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Indicate whether the statement is true or false