ECN Electrical Forum - Discussion Forums for Electricians, Inspectors and Related Professionals
ECN Shout Chat
ShoutChat Box
Recent Posts
Where is Everyone?
by gfretwell - 04/09/21 01:08 AM
HI gang, long time since I was here...
by gfretwell - 04/09/21 01:02 AM
Lock-down Thread
by gfretwell - 04/06/21 09:30 PM
Portable Generator Grounding
by JoeTestingEngr - 03/14/21 03:48 PM
New in the Gallery:
Facebook follies, bad wiring
FPE in Germany pt.2
Who's Online Now
1 registered members (Scott35), 6 guests, and 17 spiders.
Key: Admin, Global Mod, Mod
Previous Thread
Next Thread
Print Thread
Rate Thread
Cable Point of Entry #219010 01/10/18 01:55 PM
Joined: Jan 2018
Posts: 13
L
libellis Offline OP
Member
The National Electrical Code definition of Point of Entry for fiber optic cable (NEC 2014, Article 770.2) states:

"The point within a building at which optical fiber cable emerges from an external wall, from a concrete floor slab, from rigid metal conduit (RMC), or from intermediate metal conduit (IMC)."

My question is if a conduit run that contains metal pull boxes is used to create a distant Point of Entry within a building, is this still code compliant, or are pull boxes not allowed?

I would think that it would still be compliant, otherwise a long conduit run without pull boxes could be impractical, but I don’t know if a pull box would be considered as exposing the cable. Code prohibits non fire rated cable from running more than 50’ exposed from the Point of Entry.

2017 / 2014 NEC & Related Books and Study Guides
Re: Cable Point of Entry [Re: libellis] #219011 01/10/18 02:27 PM
Joined: Jul 2004
Posts: 9,575
G
gfretwell Offline
Member
As a general rule you don't use the "definition" section to describe methods. That is just defining terms. Go down to section II in article 770 to read more about fiber entering buildings. (starting at 770.47)
If you look at raceways in Chapter 3 of the code you will see that boxes and conduit bodies are considered to be part of the raceway system if they are installed in the correct manner so that part of your question is "yes" they are allowed in that system.


Greg Fretwell
Re: Cable Point of Entry [Re: gfretwell] #219014 01/10/18 09:40 PM
Joined: Jan 2018
Posts: 13
L
libellis Offline OP
Member
Much appreciated - that answer was right on target.

Article 770.48 was the motivation for my asking the question, but I didn't think of the Chapter 3 information regarding raceway components that you pointed out. Thanks.


Featured:

2020 National Electrical Code
2020 National Electrical
Code (NEC)

* * * * * * *

2020 Master Electrician Exam Preparation Combos
2020 NEC Electrician
Exam Prep Combos:
Master / Journeyman

 

Member Spotlight
Vlado
Vlado
Croatia
Posts: 28
Joined: February 2011
Show All Member Profiles 
Top Posters(30 Days)
BigB 4
Popular Topics(Views)
277,307 Are you busy
211,116 Re: Forum
198,137 Need opinion
Powered by UBB.threads™ PHP Forum Software 7.7.3