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  • nicolasumaras commented on thediylife's instructable Simple Arduino Home Energy Meter2 years ago
    Simple Arduino Home Energy Meter

    You could either buy to transformers or tap the neutral. You only need to monitor both phases if you have something that runs on 240V, in that case the electricity flow between the two phases and not through the neutral. If you don't have any 240v socket just use the neutral: everything that "comes" from both phases will flow trough the neutral.

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