There are many differing systems using different voltages and frequencies, some using alternating current (AC) and some using direct current (DC).
Some using alternating current (AC) and some using direct current (DC). There are many differing systems using different voltages and frequencies.
There are many differing systems using different voltages and frequencies. Some using alternating current (AC) and some using direct current (DC).
There are many differing systems using different voltages and frequencies. Some using alternating current (AC) and some using direct current (DC).