According to the National Electrical Code, the number of conductors in a raceway shall not be more than what can be installed or withdrawn without damage to the conductors or to the conductor ...

If raceway is too small, you can damage conductors while trying to pull them through. Even if they aren’t damaged during the pull, they may overheat inside an undersized raceway. For these reasons, ...

Permanently Using Extension Cords As Fixed Wiring S. codes require fixed wiring to be installed in approved conduit, raceways ...