Dimming

[and!ru]

Hello, I’m going to be running some dimming cable for a class 1 dimming device (DVSTV Lutron). Typically, the lighting dimming conductors I’ve done in the past is contained in boxes and conduit, but I will need to free air cable for this job. Is it code compliant to come out of the device box housing a class 1 dimming device and free air cable to the lighting fixture? The insulation of power and 0-10v dimming are both rated 600V.

 

[hbiss]

More and more I'm seeing dimming ballasts with the 0-10V leads identified as being Class 1 only. I'm assuming that this is done to eliminate the conundrum you face which is created by mixed line voltage and CL2 in the same fixture and dimmers.

If this is not the case with the equipment you have, it is allowed to run CL2 cable independently for the dimming.

-Hal

 

[and!ru]

More and more I'm seeing dimming ballasts with the 0-10V leads identified as being Class 1 only. I'm assuming that this is done to eliminate the conundrum you face which is created by mixed line voltage and CL2 in the same fixture and dimmers.

If this is not the case with the equipment you have, it is allowed to run CL2 cable independently for the

Instructions don’t specifically refer to 0-10v being class 1. However, it does state the product is intended for class 1 installations only. The lighting fixture doesn’t mention anything in the instructions. I’ll have to check what the led driver says.

 

[Strathead]

Hello, I’m going to be running some dimming cable for a class 1 dimming device (DVSTV Lutron). Typically, the lighting dimming conductors I’ve done in the past is contained in boxes and conduit, but I will need to free air cable for this job. Is it code compliant to come out of the device box housing a class 1 dimming device and free air cable to the lighting fixture? The insulation of power and 0-10v dimming are both rated 600V.

Simple answer is "no". I think of it this way. The power supply is what determines whether you can run wiring as class 2. However, if anywhere along the entire wiring system extending beyond the power supply is wired as class 1, then the ENTIRE wiring system supplied by that power supply is "compromised". Once compromised, the power supply is no longer considered a Class 2 power supply and is now classified as a Class 1 power supply. A Lutron dimmer that is class 1 only means that the power and dimming wires don't have the separation required for class 2. Once the device is used, all wiring on that circuit is class 1.

 

[Strathead]

Instructions don’t specifically refer to 0-10v being class 1. However, it does state the product is intended for class 1 installations only. The lighting fixture doesn’t mention anything in the instructions. I’ll have to check what the led driver says.

It doesn't matter what the driver says.