I have a custom built new construction home, but I was not involved with the build process, so I don't know the thought behind some of the equipment decisions.
I am an engineer, so curiosity has me exploring some of the technical details of my home, I am not having any issues with the electrical system.
Near the main electrical panels, there are three low voltage DC power supplies. I am trying to understand what they are used for.
Using a multimeter, I was able to determine that they are powered via a circuit breaker in the main panel labeled "Low Voltage System". Turning this breaker off doesn't seem to make anything in my home stop functioning (Lighting, smoke alarms, HVAC all work normally with this breaker turned off).
They are not involved with the door bell or HVAC equipment (As there are standard AC transformers for this equipment).
My home is equipped with a generator transfer switch (See: Using portable generator with transfer switch), could these somehow be involved with that?
Does anyone know what these power supplies are used for?
Main Electrical Panels:
Cover Removed from power supply:
Best Answer
After additional searching, I found that these power supplies are used for the full home audio system using similar (But not the same) wire as each speaker uses. The system was never fully installed, so I didn't notice it before.
Currently all of the speakers and outputs of these power supplies are just left un-terminated in giant spool of wire in the utility room. I don't believe this to be code compliant as the low voltage and high voltage wire share a single conduit.