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I am checking an install and noticed the voltage between line and earth is 190 volts. I checked incoming supply voltage with the main consumer unit isolated and am getting 220v l-n and l-e when I switch cu on voltage l-n is 220 volts l-e drops to 190 volts I have disconnected all circuits and all is fine I connected ring circuit everything unplugged no short circuits between conductors full loop on all conductors. when I switch on voltage on incoming supply l-e I 190 volts switch of cu and incoming voltage is back o 220 volts. disconnected all again disconnected cooker at cooker switch connected cooker circuit in cu and same happens help
