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Conduit Fill Measurement When Utilizing A number of Cables Of different Sizes

I have a fundamental panel in my garage and I’d like to install a subpanel in my basement. My plan is to run a 60A circuit to the subpanel (utilizing 6/three NM) as well as 2x 12/three NM homeruns; one to feed 2 cirucits of lights and a second that wouldn’t be linked to my main panel but, but could be available for convenience if I later needed to add 2 more circuits within the basement. I was planning to use Schedule forty PVC (inspector advised me this would be tremendous), and the overall run of conduit inside the storage to the junction field within the basement shall be approx 40′ in size.

Ebara Ougon No Aji Chu Kara (What size of PVC conduit would I have to satisfy conduit fill requirements? Would I be ready to make use of smaller conduit sizes if I stripped the sheathing from the 14/three and 12/three cables?

In my research, I’ve come throughout this publish (What type of wire for subpanel in connected garage?), and it appears that evidently my cross-sectional areas could be:

Resulting in a complete area of

0.3316625 + zero.094521 + 0.094521 = 0.5207045.

In this put up (How do I determine the fill ranking of a conduit?), there’s a desk in NEC 2014 Chapter 9 Desk four for PVC Schedule forty indicating Over 2 wires requires forty% fill area; so it looks as if 1 1/four” PVC would enable for .581″ size, granting enough measurement for the .521″ space that I believe I’d have wih those three cables. Am I deriving this correctly?

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