Editing Three-phase electric power (section)

=== Phase sequence ===
{{see also|Electric machine#Sequence}}
Wiring for three phases is typically identified by colors that vary by country and voltage. The phases must be connected in the correct order to achieve the intended direction of rotation of three-phase motors. For example, pumps and fans do not work as intended in reverse. Maintaining the identity of phases is required if two sources could be connected at the same time. A direct connection between two different phases is a [[short circuit]] and leads to flow of unbalanced current.