In network distribution, the term 'grid of secondary cables' refers to...

• A. A single transformer feeding many customers.
• B. A backbone of transmission lines.
• C. The network of transformers tied together with a grid of secondary cables feeding multiple customers.
• D. A set of isolated lines with no interconnection.

Answer: (C)

In network distribution, the grid of secondary cables is the interconnected web of low-voltage conductors that ties together multiple transformers to feed many customers. This mesh lets power flow through multiple paths, providing better reliability and flexibility for delivering service even if one path is disrupted. It differs from a single transformer feeding many customers, which is a radial setup; from a backbone of transmission lines, which operate at high voltage and sit upstream of distribution; and from isolated lines with no interconnection, which lacks the redundancy and multiple-supply paths of a grid.