FIber Optic Cable in conduit with 110VAC

[trosefl]

We have a situation where originally we had 2 conduits run to a pole for a camera installation; (1) for fiber, (1) for 110VAC. The Fiber Conduit has bee damaged and the EC on the job instructed us to run the fiber in the same conduit as the 110 circuit. I thought I remembered seeing that this was improper, even though the fiber is not a conductor. Is there a specific section of the code that addresses this.

 

[bthielen]

Re: FIber Optic Cable in conduit with 110VAC

I am not aware of any code that addresses this. It is my understanding that fiber-optics are immune to electrical interference and so it shouldn't be an issue. Perhaps there are others out there with more credible information.

Bob

 

[don_resqcapt19]

Re: FIber Optic Cable in conduit with 110VAC

770.52(A) ... Nonconductive optical fiber cables shall be permitted to occupy the same cable tray or raceway with conductors for electric light, power, Class 1, non?power-limited fire alarm, or medium power network-powered broadband communications circuits operating at 600 volts or less. Conductive optical fiber cables shall not be permitted to occupy the same cable tray or raceway with conductors for electric light, power, Class 1, non?power-limited fire alarm, or medium power network-powered broadband communications circuits. ...

770.6 ... Where nonconductive optical fiber cables are installed with electric conductors in a raceway, the raceway fill tables of Chapter 3 and Chapter 9 shall apply. ...

[ February 04, 2005, 10:36 AM: Message edited by: don_resqcapt19 ]