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    MCB size and type required for a 10.8kW electric shower

    I've replaced an old electric shower with a 10.8 kW shower. However, I need to replace the current 30 Amp MCB with a higher rated MCB. The installation guide specifies 45 Amp. However, the nearest match to this I can get for my consumer unit is 40 Amp and 50 Amp. Should I...
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