On Fri, 7 Apr 2017 12:10:16 -0700 (PDT), DerbyDad03
wrote:

On Friday, April 7, 2017 at 2:52:07 PM UTC-4, Terry Coombs wrote:
DerbyDad03 wrote:
Is there any code-compliant way to plug a 12V power supply pod into
an attic receptacle and
have the 12v wire run to a wall mounted device in the room below? The
receptacle is close
enough to the device's location that the cord will easily reach. The
device is up near the ceiling, and we're trying to avoid running the
power cord (or a track) up the wall, in plain sight.

Would this be considered a flexible cord under NEC 400 and therefore
not allowed, even
though it's only 12V?

If we can't, we'll run Romex from the attic receptacle and install a
receptacle for the pod. It would just be neater (and easier) to use
the attic receptacle.

Constructive ideas are always welcome.

They run doorbell wiring like that all the time ... drill the top plate
and run the wire inside the wall , let it come out behind the drvice .
--
Snag

Doorbell wires, and thermostat wires for that matter, are not typically plugged into
a receptacle at the other end - at least not in my experience. This is a plug and cord
device, with the plug being a 12VDC transformer.

That's why I'm wondering if it falls under the ”flexible cord" category or is that just for 110/220
VAC
A doorbell transformer CAN be a plug-in device.
48volt nominal power on a POE device runs on Cat5 cable anywhere you
want it - and the power injector is a plug-in device like your "wall
wart" The "flexible cord" designation only applies to direct line
connected/120 volt devices. Your Class 1 or class 2 power supplies
are not covered by that code.
Class 1 power-limited circuits are supplied by a power supply with an
output that does not exceed 30 volts and 1,000 volt-amps.
In general, a Class 2 circuit (operating at 24V with a power supply
durably marked "Class 2" and not exceeding 100VA) is the type most
commonly used. The NEC defines a Class 2 circuit as that portion of
the wiring system between the load side of a Class 2 power source and
the connected equipment.
They are considered "intrinsically safe"