why 3 phase electricity instead of 4 or 5, etc?
In: 1
At one phase, you have the power fluctuating between -1 and 1. At two phase power you have the power fluctuating between 0 and 1. At three phase power you have the power fluctuating between .58 and 1.
It will never be perfect, and each phase you add gets exponentially more expensive to get and install equipment for.
Between .6 and 1 is enough for 99% of things that require electricity.
That said some super sensitive lab equipment will occasionally run on 4 or 5 phase power.
Latest Answers