Kohler 20kw Generator Wiring Diagram Extra Quality
The RDC2 expects 240V across N1 and N2 (each 120V to neutral). Accidentally connecting N1 and N2 to the same phase (e.g., both from L1) will make the controller think utility power is gone constantly—it will run the generator even when grid power is on. The diagram shows N1 and N2 must land on opposite utility lines.
Outside, the first branches began to snap. Elias double-checked the grounding, ensuring the generator frame was securely bonded to prevent a lethal backfeed into the utility lines. He glanced at the RDC2 Controller Kohler 20kw Generator Wiring Diagram