The AC system was not completed until circa 1958.

AC systems make sustained arcing somewhat less likely, since the current returns to zero twice per cycle.

This article deals with power in AC systems.

The change to an AC system was a significant improvement.

Eventually, however, everyone pulled together to come up with just the right formula: an AC system based on three-phase, 60-cycle current.

In an AC system, the voltage and currents do not have to rise and fall at exactly the same time.

In an AC system it is not desirable to allow voltages to vary more than a small amount with demand.

Several factors influence the choice of frequency in an AC system.

The engine may also restart if there is a demand for power from, for example, the AC system.

Following this an AC system was suggested, and this was accepted by both parties.