110 or 220 for home service. Businesses may require 440 volts.
There is no formula to convert voltage. Voltage is universal.
US Voltage is 120 V @ 60 Hz.Ecuador Voltage is 120 V @ 60 Hz.They're compatible, the plugs are also the same.
the voltage and frequency are 110v and 50(or)60hz because the devices which are invented in us are work at that voltage and it is efficient for that devices.
It depends on the country as to which voltage is used for industrial purposes. In the US, for welding for example, voltage may be 480 volts. The frequency in the US is 60 Hertz.
Simran manufactures its voltage converters in the US. The SMF-200 Voltage Converter is a great buy and made in the USA.
110 v/DC
110-120 Volts BUT IN SOME AREAS 220.
110volt
60HZ
110/220
120 volts...
120 volts...