LV Sprinkler Control & 120V Power Cir

[BAHTAH]

Can a LV Sprinkler control circuit be run in a conduit with 120V Power if the conductors used are 600V rated? I see conductor separation in the code for Class 2 and 3 conductors but no mention about the use of 600V conductors in a low voltage application.

 

[infinity]

Re: LV Sprinkler Control & 120V Power Cir

The answer is no. CL2 and CL3 circuits must be run separate from 120 volt circuits regardless of the conductor insulation.

 

[tom baker]

Re: LV Sprinkler Control & 120V Power Cir

See the following sections
90.3
725.54
300.3(C)(1) and its FPN

 

[shelco]

Re: LV Sprinkler Control & 120V Power Cir

Low voltage sprinkler control would be , what 12v, 24v, 48v? What prevents this from being in the same conduit with 120 as long as insulation is rated for the highest voltage in that raceway.
I see nothing preventing this from being ok.

 

[ron]

Re: LV Sprinkler Control & 120V Power Cir

Is the power circuit related to the sprinkler/fire alarm?
Power limited, then see 760.54
non-power limited see 760.25, 760.26

 

[infinity]

Re: LV Sprinkler Control & 120V Power Cir

Low voltage sprinkler control would be , what 12v, 24v, 48v? What prevents this from being in the same conduit with 120 as long as insulation is rated for the highest voltage in that raceway.
I see nothing preventing this from being ok.

The insulation value has nothing to do with the prohibition. 725.55(A) Explicitly does not allow Class 2 or Class 3 conductors to occupy the same raceway as electric light and power conductors.

 

[shelco]

Re: LV Sprinkler Control & 120V Power Cir

Infinity
I apologize, you are correct I had my classifications and definitions askew. I interpreted this circ. to be a standard control cir.

 

[infinity]

Re: LV Sprinkler Control & 120V Power Cir

Shelco,

No need to apologize......