I am working to run 2 new circuits (each 60A using 3-#6 THHN-2 and 1-#10 EGC) through a 24" pass through from the main panel on exterior to a 1.25" PVC conduit in the basement). The circuits where planned to run from the MSP down through a 2" PVC conduit to pass through to the basement where they would immediately enter the PVC (to avoid conduit on the outside of the home as homeowner desires). That 2" conduit already houses 6 NMB/Romex circuits (4 #12/2 and 2 #10/3). There is enough room per NEC conduit fill calculations, but our inspector believes that the new circuits must be run complete from the start to finish and cannot be contained in this 24" pass through with existing circuits.
I believe that the 24" section of conduit from the MSP to the basement should not be a problem, especially because the short run is PVC, not metal.
2017 NEC 300.18 RaceWay Installation , exception states: "short sections of raceway used to contain conductors or cable assemblies for protection from physical damage shall not be required to be installed complete between outlet, junction, or splicing points".
I also reviewed NEC 300.20:- I believe this may have been a concern of inspector , but it applies to metallic raceways. Induced Currents in Ferrous Metal Enclosures or Ferrous Metal Raceways: (A) Conductors Grouped Together. Where conductors carrying alternating current are installed in ferrous metal enclosures or ferrous metal raceways, they shall be arranged so as to avoid heating the surrounding ferrous metal by induction. To accomplish this, all phase conductors and, where used, the grounded conductor and all equipment grounding conductors shall be grouped together.).
Please let me know your thoughts- is this acceptable or do we need to run a separate conduit on the outside of the home?
I believe that the 24" section of conduit from the MSP to the basement should not be a problem, especially because the short run is PVC, not metal.
2017 NEC 300.18 RaceWay Installation , exception states: "short sections of raceway used to contain conductors or cable assemblies for protection from physical damage shall not be required to be installed complete between outlet, junction, or splicing points".
I also reviewed NEC 300.20:- I believe this may have been a concern of inspector , but it applies to metallic raceways. Induced Currents in Ferrous Metal Enclosures or Ferrous Metal Raceways: (A) Conductors Grouped Together. Where conductors carrying alternating current are installed in ferrous metal enclosures or ferrous metal raceways, they shall be arranged so as to avoid heating the surrounding ferrous metal by induction. To accomplish this, all phase conductors and, where used, the grounded conductor and all equipment grounding conductors shall be grouped together.).
Please let me know your thoughts- is this acceptable or do we need to run a separate conduit on the outside of the home?