Build my own cabin - DIY projects

NEC 2014: Table 310.15(B)(3)(a)

 

Adj Factors for More than 3 Current-Carrying Conductors in a Raceway or Cable
Number of Current-Carrying Conductors Percent of Value in Tables 310.15 through 310.19 as Adjusted for Amb Temp if Necessary
4-6 80
7-9 70
10-20 50
21-30 45
31-40 40
41 and above 35

Back to Index of NEC Tables

Click the icons below to get our NEC® compliant Electrical Calc Elite or Electric Toolkit for Android and iOS.  The Electrical Calc Elite is designed to solve many of your common code-based electrical calculations like wire sizes, voltage drop, conduit sizing, etc.  The Electric Toolkit provides some basic electrical calculations, wiring diagrams (similar to those found on this website), and other electrical reference data. 

      Electrical Calc Elite    electric-toolkit-android