# Single phase circuit on 3 phase current calc

 Hi,I have a question regarding calculating current in a 3 phase supply. I have my head around how to calculate the current in a 3 phase circuit. For example if we have a 22kw load assuming a power factor of 0.8 would be 22000/(1.732x415x0.8) = 38.25AHowever if I’m installing a 7.2kw single phase circuit on a 3-phase supply I.e using L1 (or L2 or L3) and neutral. Is the calc 7200/(1.732x230x0.8) = 18.06 ampsIt’s not the usual 7200/230 (simplified calc) where the current would be 31.30A we would use for a single phase supply?. Even though it is a single phase circuit?.Thanks,A. asked 6/15/2019 spark83192

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