A dedicated three‑phase distribution board (DB) in a home installation will almost always outperform a four‑way consumer changeover unit (CCU) for these key reasons:1. Proper Load Balancing • Three‑phase DB: Each phase feeds its own circuits (lighting, sockets, HVAC, kitchen appliances), so loads are spread evenly across all three phases. This minimizes neutral currents, voltage drop and overheating. • Four‑way CU: It simply switches between two whole‑supply sources—there’s no granular per‑phase
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