Are you prohibited from using a neutral conductor for more than one branch circuit?

Using a neutral conductor for more than one branch circuit is generally not permissible according to the National Electrical Code (NEC) and its application in Ohio. Each branch circuit is designed to operate independently, and allowing a single neutral conductor to serve multiple circuits can lead to several safety issues, including overloading, potential overheating, and the risk of electrical shock hazards.

Specifically, when more than one circuit shares a neutral and one of those circuits is heavily loaded, it could lead to an unbalanced condition, causing the neutral to carry more current than it is rated for. This scenario can create a fire hazard or lead to tripped breakers. Furthermore, the code emphasizes the importance of ensuring each circuit is protected and operates within its designated parameters to maintain safety and functionality.

Hence, the prohibition underscores the commitment to ensuring safe and effective electrical installations in residential and commercial settings where the risk of overloads can have significant safety repercussions.