1.6 KiB
id, aliases, tags, title
| id | aliases | tags | title | |||||
|---|---|---|---|---|---|---|---|---|
|
Lighting Controls |
Lighting Controls
Technologies
- Triac (Line voltage dim)
- Analog (0-10V dim)
- Digital
- Wireless
All these control methods are likely to appear in drawings.
0-10V Dimming
In conduit:
Southwire 64350501
SIMpull® 16/2 Low Voltage Signal Cable, Blue
This method is compliant with nfpa-70_725_control-circuits#725.136(I) Other Applications., which allows control circuits to share a raceway with power conductors if either all of the power conductors or all of the control conductors are themselves in a raceway, or in metal-sheathed, metal-clad, non–metallic-sheathed, or Type UF cable.
Triac Dimming
Triac dimmers work by chopping the AC power waveform. This reduces the output power, so the lamp dims.
[!info] "Triac" refers to the electronic component that does the wave-chopping.
There are two subtypes based on which side of the wave is chopped.
- Magnetic Low Voltage (MLV)** -- AKA "Leading Edge" or "Forward Phase"
- Electronic Low Voltage (ELV)** -- AKA "Trailing Edge" or "Reverse Phase"
Important
The "magnetic" and "electronic" of MLV and ELV are holdovers from pre-LED days. They have nothing to do with how they are used today. They are, unfortunately, the most common terms.
Important
"Triac" is sometimes used in contrast to ELV erroneously to mean MLV
There also exist "universal" dimmers, which can be switched between the two subtypes.