help with dimmers

[copper chopper]

I am trying to convince my shop that this is legal and saves money please help: LED 2x2 lights on a dimmer. The dimmers require 2 extra wires that carry a 10 vdc line to the ballast.My shop has us on this job putting in an extra 1/2 inch conduit from every box with an arlington bushing on it. They want us to daisy chain a 18/2 cable from every light and then to the dimmer which we have done on other jobs that were a RETROFIT. This is a new building, I need code articles that support this method.We want to run 2- 16 gauge thhn conductors along with the 120 volt power wires to the fixtures including in the same 3/8 fixture whip.I have found 300.3c1 but cant find the fixture whip fill .

Please help

 

[don_resqcapt19]

You found the rule in 300.3(C)(1) but did you read Informational Note #1?.
Is the control circuit a Class 1 circuit or a Class 2 circuit? If it is a Class 1 circuit, you can run it in the whip with the power wires, if it is a Class 2 circuit, you can't.

 

[qcroanoke]

I am trying to convince my shop that this is legal and saves money please help: LED 2x2 lights on a dimmer. The dimmers require 2 extra wires that carry a 10 vdc line to the ballast.My shop has us on this job putting in an extra 1/2 inch conduit from every box with an arlington bushing on it. They want us to daisy chain a 18/2 cable from every light and then to the dimmer which we have done on other jobs that were a RETROFIT. This is a new building, I need code articles that support this method.We want to run 2- 16 gauge thhn conductors along with the 120 volt power wires to the fixtures including in the same 3/8 fixture whip.I have found 300.3c1 but cant find the fixture whip fill .

Please help

If the fixture whip came installed in the fixture probably not.
It is probably a listed assembly and modifying it may violate that nasty thing called the UL listing.

 

[iwire]

I looked up some Phillips 0-10 volt dimming ballasts and the particular model I looked at indicated the control is class 1 or class 2. I assume they mean it's up to the installer.

Here is a link www.lighting.philips.com/pwc_li/us.../2-01_to_2-33_Atlas2012.pdf? Scroll down to page 2-7.

BUT, that said, you will have to look up the info for your specific ballast to determine if it can be run class 1.

 

[infinity]

We've installed thousands of Lutron Eco ballasted fixtures and always opt for the Class 1 control which allows the 0-10 volt conductors to be installed with the power conductors.

From Lutron:

EcoSystem ? digital link
Models available: EcoSystem H-Series, EcoSystem, and
Hi-lume ? 3D ballasts
Dimming levels available: 1%, 5% and 10%
The EcoSystem digital link is a wired communication technology that
facilitates individual ballast addressing, connection of multiple control
devices, and control of ballasts individually or in groups. The digital
communication wires are polarity insensitive and may be wired in any
topology. They may be run with the line-voltage wiring (Class 1) or
separately from the line-voltage wiring (Class 2). The EcoSystem digital
link allows for the quick connection of devices and re-configurability.

Link: http://www.lutron.com/technicaldocumentlibrary/366-606_fds_tg.pdf

 

[copper chopper]

thank you infinity that is the exact system we are installing with the nova t dimmers.