Prysmian Group’s Conduit Fill calculator is a quick and easy tool to calculate the minimum conduit size per National Electrical Code. It is designed for engineers, contractors, and other electrical professionals to find quick answers without spending hours on lengthy calculations. Features: Code Selection for NEC® 2011, 2014, and 2017. Metric or standard conductors Allowable fill rates for combination of conductors Calculates minimum conduit size for compact stranded conductors Over fifty different types of insulation Over ten different conduit types Results show total area required, nipple size, and minimum conduit size