EN: Never Oversize the Upstream MCB — RCCB Protection Explained #ElectricalSafety#MCB#RCCB#Circuit
1:09
YouTubeSMART HOUSE-T2U
EN: Never Oversize the Upstream MCB — RCCB Protection Explained #ElectricalSafety#MCB#RCCB#Circuit
In this video, I explain why the upstream MCB must always have a lower current rating than the RCCB. This coordination rule is essential to ensure proper protection, selectivity, and safe disconnection during fault conditions. You’ll see practical examples, current calculations, and the correct way to size the upstream MCB so the RCCB is ...
2 views1 month ago
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