Conduit sizing is a balance of geometry, physics, and practical experience. Respect the fill limits, calculate your area, and your pulls will be smooth every time.
The cost difference between ¾-inch and 1-inch conduit is negligible compared to the labor cost of struggling with a pull, or the cost of re-doing the work later if you need to add a wire. conduit sizing for cables
The primary goal of sizing is to maintain an appropriate , which is the ratio of the total cross-sectional area of all conductors to the internal area of the conduit. The National Electrical Code (NEC) provides standard fill limits based on the number of conductors: Conduit sizing - the Nuclear Electrical Engineer Conduit sizing is a balance of geometry, physics,