Zak Dabbagui

Filling inside the wireway

Discussion created by Zak 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?