Why does the voltage drop when I turn on the microwave?
Why does the voltage drop from 260 Volts to 160 Volts when the load is turned on (800 W microwave). What is the reason? The house has a 3-wire connection. Between the "ground" and "0" 5 volts. And it seems that the counter is spinning when all consumers are turned off.
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Hello! Drawdowns are possible due to poor contact on one of the line connections, find out from the riser neighbors (connected to the same phase) whether they have such a problem. If so, contact your supplying or managing organization.