Smeg CV10B - Manual (Page 6)

Instructions for Use 64
Connection to Power Supply
Connect the appliance with the cable and plug to the power supply
socket outlet with a ground terminal (safety socket).
Required nominal voltage and frequency are indicated in the rating
plate.
The connection to the mains supply and earthing have to be made
according to current standards and regulations.
The appliance resists temporary voltage tolerance up to -15 to +10 %.