Lectrician
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if you mean, using 12 volt to power your house, via a Istep up transformer, then you are correct. Lower the volts, and for the same load, the current will rise.
This is why the electricity boards do the exact opposite. To combat the problems of volt drop associated with a large current flow, they up the volts to lower the current.
For example, a substation with an output rated at 1500amp, will only draw about 30amp from the 11, 000 volt primary side, when this load is placed on the national grid at 132,000 volt then the current is only going to be about 3 amp.
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