Walker duct
- Thread starter wolcott60
- Start date
- Status
- Location
- Massachusetts
We run miles of regular cat 5 in walker duct.
ron
Senior Member
- Location
- New York, 40.7514,-73.9925
I have also run it in walker duct. I think the proper code reference is that it is an actual raceway covered by Article 374.
T-Kuhlman
New User
- Location
- Portland, OR, USA
You didn't mention the application where the Cat5 cable was being used. This can make a difference in which article of the Code applies. If it is a data circuit it would be covered under Article 725. If it is a telephone communication circuit it would be covered under Article 800. The cable will most likely have a CM or CMR listing on the jacket. Although this listing type is defined in Article 800, 725 allows a CM or CMR cable to be substituted for a Class 2 (or 3) general purpose (CL2) or riser cable (CL2R). It all depends on the application.
725 recoginizes the difference in Class 2 (or 3) data cables due to the electrical power limitations of these types of circuits and not exceptions to Chapter 1 to 4, but in your example it does not make any exceptions to a cellular metal for raceway. In the case of Article 800, it permits the use of all the raceway types listed in Chapter 3 (800.110 (A) (1)).
In the 2014 NEC there was a new paragraph added in 725 for "Other Articles" that apply to Cat 5 (Class 2) cabling (725.3 (L). This references to Articles 110.11, 300.5(B), 300.6, 300.9 and 310.10(G). You don't have to be concerned with "corrosive" areas because you can't place a cellular floor raceway in this environment anyways. However, 300.9 address wet locatations above grade and adds another reference to 310.10(C). So, if the walker duct (cellular floor raceway) is going to be considered a Wet location, than the cable has to listed for a wet location. The NEC does not have an applicable wet designator for CL2, CL2R, CM or CMR cabling. You would have to look for some other marking stating is suitible for wet locations if you think the walker duct is a wet location.
Tim
725 recoginizes the difference in Class 2 (or 3) data cables due to the electrical power limitations of these types of circuits and not exceptions to Chapter 1 to 4, but in your example it does not make any exceptions to a cellular metal for raceway. In the case of Article 800, it permits the use of all the raceway types listed in Chapter 3 (800.110 (A) (1)).
In the 2014 NEC there was a new paragraph added in 725 for "Other Articles" that apply to Cat 5 (Class 2) cabling (725.3 (L). This references to Articles 110.11, 300.5(B), 300.6, 300.9 and 310.10(G). You don't have to be concerned with "corrosive" areas because you can't place a cellular floor raceway in this environment anyways. However, 300.9 address wet locatations above grade and adds another reference to 310.10(C). So, if the walker duct (cellular floor raceway) is going to be considered a Wet location, than the cable has to listed for a wet location. The NEC does not have an applicable wet designator for CL2, CL2R, CM or CMR cabling. You would have to look for some other marking stating is suitible for wet locations if you think the walker duct is a wet location.
Tim
- Location
- Massachusetts
Walker duct would be Article 390 Underfloor Raceways. I am not sure if that changes anything or not.
- Status