Connect the phase and neutral wires from the input power supply to the input of the Main MCB. And all the switching and protective devices are installed in the distribution box. Single Phase Distribution Box generally consists of Double Pole MCBs, Single Pole MCBs, and RCCBs. Discover how to connect circuit breakers, neutral and earthing busbars, and other essential components for a safe and efficient electrical setup. Perfect for electricians and DIY enthusi. In Single Phase supply (230V in UK, EU and 120V & 240V in the US & Canada), there are two (one is Line (aka Phase, Hot or Live) and the other one is Neutral) incoming cables from the utility poles to the kWh energy. Neutral Bus Bar: Connects all the neutral wires from the circuits. Incoming Live Wires: Supply power from the main service.
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