The voltage and current labeled on the electrical nameplate refers to pages in the book

Not in the book. Electrical nameplate labeled voltage, current refers to the current and voltage refers to normal operation, the book does not, but also the rated current and rated voltage. The voltage on the nameplate of the electrical equipment must be the same as the power supply voltage, if the power supply voltage is higher than the voltage on the nameplate, it will lead to an increase in the current of the electrical equipment to damage the equipment. If the supply voltage is lower than the voltage on the nameplate, the electrical equipment can not work properly.