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Fiber with Electric
This thread has 5 replies. Displaying all posts.
Post 1 made on Monday July 27, 2020 at 18:08
3PedalMINI
Loyal Member
Joined:
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July 2009
7,815
I have a serious situation were dealing with, It was found out that my conduit run from house to garage/Pool House was compromised, the GC/Electrician thinks a pipe wasn't glued or something shifted when they were regrading the land. The landscaping is to far along and we cant get a trencher through given the different terraces/rocks/pools.

Electrician and GC want to run my fiber in their conduit, they said they are ok with it and the inspector wont care since fiber isnt conductive. Now, Normally I wouldn't agree with them but this is a special circumstance, Im worried that should the fiber fail for any reason I would need to re-pull the line with HV in it.

I cant use armor shielded DB fiber due to the metallic nature of it.

Thoughts, I dont think I could use a P2P air solution due to the landscaping.
The Bitterness of Poor Quality is Remembered Long after the Sweetness of Price is Forgotten! - Benjamin Franklin
Post 2 made on Monday July 27, 2020 at 18:24
Audiophiliac
Super Member
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August 2006
3,207
Go for it. Sounds like you have no other option. If it works, nothing lost.
"When I eat, it is the food that is scared." - Ron Swanson
Post 3 made on Monday July 27, 2020 at 18:54
internetraver
Active Member
Joined:
Posts:
April 2003
685
Guided boring.  Can be expensive but will get you there.
Post 4 made on Monday July 27, 2020 at 21:54
PHSJason
Advanced Member
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December 2002
991
I have done this before after reviewing with AHJ when only one conduit to an outbuilding was available. No issues and all signed off on by inspector.
Post 5 made on Monday July 27, 2020 at 22:59
edizzle
Loyal Member
Joined:
Posts:
March 2005
5,866
municipal fiber providers do this all the time to get FTTH services to homes.

"Here is what 770.133 of the 2008 NEC says about fiber optic cables installed with electric light and power circuits.

770.133 Installation of Optical Fibers and Electrical Conductors.


(A) With Conductors for Electric Light, Power, Class 1, Non–Power-Limited Fire Alarm, or Medium Power Network-Powered Broadband Communications Circuits. When optical fibers are within the same composite cable 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, they shall be permitted to be installed only where the functions of the optical fibers and the electrical conductors are associated.


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, Type ITC, 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, Type ITC, or medium-power network-powered broadband communications circuits.
Optical fibers in composite optical fiber cables containing only current-carrying conductors for electric light, power, Class 1 circuits rated 600 volts or less shall be permitted to occupy the same cabinet, cable tray, outlet box, panel, raceway, or other termination enclosure with conductors for electric light, power, or Class 1 circuits operating at 600 volts or less.
Nonconductive optical fiber cables shall not be permitted to occupy the same cabinet, outlet box, panel, or similar enclosure housing the electrical terminations of an electric light, power, Class 1, non–power-limited fire alarm, or medium-power network-powered broadband communications circuit.

Exception No. 1: Occupancy of the same cabinet, outlet box, panel, or similar enclosure shall be permitted where nonconductive optical fiber cable is functionally associated with the electric light, power, Class 1, non–power-limited fire alarm, or medium-power network-powered broadband communications circuit.

Exception No. 2: Occupancy of the same cabinet, outlet box, panel, or similar enclosure shall be permitted where nonconductive optical fiber cables are installed in factory- or field-assembled control centers.


Exception No. 3: In industrial establishments only, where conditions of maintenance and supervision ensure that only qualified persons service the installation, nonconductive optical fiber cables shall be permitted with circuits exceeding 600 volts.


Exception No. 4: In industrial establishments only, where conditions of maintenance and supervision ensure that only qualified persons service the installation, optical fibers in composite optical fiber cables containing current-carrying conductors operating over 600 volts shall be permitted to be installed.


Exception No. 5: Where all of the conductors of electric light, power, Class 1, nonpower-limited fire alarm, and medium-power network-powered broadband communications circuits are separated from all of the optical fiber cables by a permanent barrier or listed divider." -
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Post 6 made on Tuesday July 28, 2020 at 03:41
ErikU
Long Time Member
Joined:
Posts:
January 2015
135
Should be fine. Fiber is run through gas lines all the time too.


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