0-10 V Wiring for LED Control

[NickL]

Hey, spoke with many in the field and get many different views in regard to 0-10 Volt Dimmer wiring. As an"old school" (licensed in 1986) electrician the code requirement was to always keep Low Voltage Wiring out of Line Voltage Use Raceways. So, along comes 0-10V Dimming. As I read it in the code, you can now mix the Low Voltage 0-10 V. wiring within the Line Voltage Raceway as long as the Insulation Properties of the Conductors are the same. If that's the requirement, why do I keep finding guys who throw everything in one raceway without regard to the insulation type, I've even seen Cat5 co-mingled in Line Voltage Raceways for 0-10 signalling. That just can't be right!
Let me hear your thoughts, opinions, your installations and some crazy installations you found regarding 0-10 Volt Dimming Wiring.

 

[LEO2854]

Hey, spoke with many in the field and get many different views in regard to 0-10 Volt Dimmer wiring. As an"old school" (licensed in 1986) electrician the code requirement was to always keep Low Voltage Wiring out of Line Voltage Use Raceways. So, along comes 0-10V Dimming. As I read it in the code, you can now mix the Low Voltage 0-10 V. wiring within the Line Voltage Raceway as long as the Insulation Properties of the Conductors are the same. If that's the requirement, why do I keep finding guys who throw everything in one raceway without regard to the insulation type, I've even seen Cat5 co-mingled in Line Voltage Raceways for 0-10 signalling. That just can't be right!
Let me hear your thoughts, opinions, your installations and some crazy installations you found regarding 0-10 Volt Dimming Wiring.

Hello Nick: Welcome to the forum:thumbsup:

If you are dimming LED lighting then the dimmer switches you're using should be rated for LED dimming.

 

[Fulthrotl]

Hey, spoke with many in the field and get many different views in regard to 0-10 Volt Dimmer wiring. As an"old school" (licensed in 1986) electrician the code requirement was to always keep Low Voltage Wiring out of Line Voltage Use Raceways. So, along comes 0-10V Dimming. As I read it in the code, you can now mix the Low Voltage 0-10 V. wiring within the Line Voltage Raceway as long as the Insulation Properties of the Conductors are the same. If that's the requirement, why do I keep finding guys who throw everything in one raceway without regard to the insulation type, I've even seen Cat5 co-mingled in Line Voltage Raceways for 0-10 signalling. That just can't be right!
Let me hear your thoughts, opinions, your installations and some crazy installations you found regarding 0-10 Volt Dimming Wiring.

well, as long as the insulation on all conductors is rated for the highest voltage present, it's acceptable.

"now" isn't really applicable, as you've been able to put motor control circuits in with motor leads for
longer than i've been doing this, provided the insulation... yada, yada.

there is currently a MC cable that has 0-10v control wires in the MC. there are also systems that
use cat 5 patch cords to go between fixtures, as in a t-bar ceiling, but they aren't in the power raceway.

 

[infinity]

If the 0-10 voltage conductors are Class2 then they must be separate from the power conductor regardless of their insulation rating. Lutron does permit their Class2 control to be re-classified as Class1 and used within the same raceway or cable as the power conductors if the insulation rating is greater than or equal the voltage level of the power conductors.

 

[Pierre C Belarge]

300.3 Conductors.

300.3(C) Conductors of Different Systems.

The first paragraph of .3(C) permits conductors of different systems to occupy the same raceway as long as the proper insulation is used.

For Class 2 supplied wiring most think the same applies, generally that is not so. There is an Informational Note following the paragraph that so many seem to miss. It refers the reader to 725.136(A) for Class 2 conductors.
The referred Section is where one finds the proper methods for installing Class 2 supplied conductors with other systems.

 

[MasterTheNEC]

If the 0-10 voltage conductors are Class2 then they must be separate from the power conductor regardless of their insulation rating. Lutron does permit their Class2 control to be re-classified as Class1 and used within the same raceway or cable as the power conductors if the insulation rating is greater than or equal the voltage level of the power conductors.

AFC's MC Luminary and Encore's MC-LED both have Class 2 and Power Conductors in the same Type MC Cable which only requires the separation via a 30 mil, nonmetallic jacket. However, you might know that already and if so..disregard.

 

[infinity]

AFC's MC Luminary and Encore's MC-LED both have Class 2 and Power Conductors in the same Type MC Cable which only requires the separation via a 30 mil, nonmetallic jacket. However, you might know that already and if so..disregard.

Yes, that would work because it's a specific type cable designed and listed for this purpose. You couldn't use a 12/4 MC cable and mix the Class2 and power conductors or pull THHN in a raceway.

I'm wondering how much does this cable cost versus a 12/4 MC cable?