Mr_bill wrote:

regarding the question about automated dimmers. I am
using (mfgr) Lightolier (model) MultiSetPro dimmers, switches,
and controllers. The system is, IMO, fairly clever. The wiring
connections, however, are very complex.

Each switch and dimmer has 5 connections: hot, neut, gnd,
switched hot, and data buss. Each controller (and there *can*
be something like 30, if you want.... I have 2) has 3 connections:
hot, neut, and data buss.

Each switch and dimmer can be operated manually just like a regular
switch/dimmer. In this case, you are manually overriding the system.
The controller has 5 "scenes". Each scene can be any combination
of dimmer/switches, and any individual dimmer brightness setting.
To program, press a scene code (for example "A"),
set up your room the way you want it,
then press a set button on each dimmer
or switch. The dimmer or switch remembers how
it is suppposed to act under program code A.
Same for B, C, D. 5th scene is all units "on".

The buss connection is low voltage, low current,
so you can use a single strand of
insulated wire and snake it to retrofit.
In my case, I had the sheetrock off, so I ran
14/3 romex and used the 3rd wire for the buss connection.

snip

I'm curious what the NEC's restrictions are (if any) on mixing line
voltage and low voltage wiring in a single box, as these apparently
call for.

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