Filling inside the wireway

Discussion created by abderrazak.dabbagui on Nov 17, 2016
Latest reply on Nov 24, 2016 by christine.porter

The article of NFPA79 clearly state the following:


13.5.2 Percentage fills of Raceways (Ducts)

"The combined cross-sectional area of all conductors and cables shall not exceed 50% of the interior cross-sectional area of the raceway (duct). The fill provisions shall be based on the actual dimensions of the conductors or cables used".


My concern is the 50% filling include the space between conductors or only the cross section area of the conductors?


This filling concern only the metal wire way, how about the plastic one?