🧱 Concrete Mix Proportions – Strong vs Weak - Weak Column (1:6 – Cement:Sand) - Too much sand, too little cement. - Low binding strength → structure crumbles easily. - Short‑term savings, long‑term repair costs. - Cracked Column (1:2:2 – Cement:Sand:Gravel) - Common errors: excess water or missing gravel. - Water evaporation leaves voids → cracks form. - Reduced durability and unsafe load capacity. - Resistant Column (1:2:3 – Cement:Sand:Gravel) - Balanced mix: cement binds, sand fills gaps, gr

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Miniature Circuit Breaker or MCB: What is it? (Working Principle) | Electrical4U

3.5K views · 12 reactions | Let’s set up an add-on block together! 欄 Our Add-On Block can be used with any Hager three pole MCB up to 63A to provide 3 phase earth leakage protection. The RCD Add-On Block + MCB combo provides both devices’ protective benefits and protects the entire circuit’s load, removing the need to wire between DIN mounted RCD and MCB.  It helps to save on installation time, labour and space in your chassis boards! | Hager | Facebook