Secondary wiring: used to control, measure, protect, and indicate signals for the primary wiring. The following is a detailed introduction to it: - **Familiarize with Drawings**: Carefully study relevant drawing materials such as electrical schematic. Primary distribution systems consist of feeders that deliver power from distribution substations to distribution transformers. A feeder usually begins with a feeder breaker at the distribution substation. Many feeders leave substation in a concrete ducts and are routed to a nearby pole. At this. Secondary Wiring of MNS Power Distribution Cabinets. Before installing, operating, maintaining, or testing this equipment, carefully read and understand the contents of this manual.
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