All electrical systems are based on a supply of power at a certain voltage and frequency. Dirty power or electrical noise is any electrical current that varies by more than 10% from the usual 120 volts. Dirty power refers to variations in voltage or current that are often random, usually of relatively low amplitude, and always undesirable. It is an abnormality in the power quality that is being delivered to a system. These abnormalities can include low power factors, voltage variations, frequency variations, and surges. Power spikes, surges, sags, and brownouts, the results of dirty power, can ruin expensive equipment.
Clean power helps protect and extend the life of your electronics.
To guard your controllers and hardware against dirty power, it is recommended to plug your equipment into a surge protector to guard against such power annoyances.
How to know if your electricity is dirty
You may also refer to the following Power Management video for additional overview information about power.