120-volt AC standard in-wall dimmers must be used with Armacost AC Dimmable Power Supplies. They are desirable to use if you already have a dimmer or an outlet controlled by a wall switch where your power supply will be connected. Simply replace the on/off AC switch with an AC dimmer and use a dimmable power supply. They are also used in new construction.
Dimmable Power Supplies are hard-wired to a 120-volt AC line controlled by a dimmer switch.