Code Q&A: Sizing a Raceway

NEC requirements for sizing a raceway

Q. What are the NEC requirements for sizing raceways?

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A. Raceways must be large enough to permit the installation and removal of conductors without damaging the conductor’s insulation [300.17]. When all conductors in a raceway are the same size and of the same insulation type, the number of conductors permitted can be determined by Annex C. When different size conductors are installed in a raceway, conductor fill is

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