When installing a neutral conductor, it is prohibited from using it for more than how many branch circuits?

When installing a neutral conductor, it is prohibited from using it for more than how many branch circuits?

• A. Only one branch circuit
• B. Two branch circuits
• C. Three branch circuits
• D. Four branch circuits

Answer: (A)

Neutral conductors in limited-energy installations are intended to serve a single branch circuit. Sharing a neutral among multiple circuits allows return currents from different circuits to mix, which can overload the neutral, affect the accuracy of protection devices, and interfere with sensing devices like GFCIs or AFCIs. Keeping the neutral dedicated to one branch circuit ensures proper overcurrent and fault protection for that circuit and prevents unintended energization or cross-talk between circuits. Therefore, the neutral must be used for only one branch circuit.

Neutral conductors in limited-energy installations are intended to serve a single branch circuit. Sharing a neutral among multiple circuits allows return currents from different circuits to mix, which can overload the neutral, affect the accuracy of protection devices, and interfere with sensing devices like GFCIs or AFCIs. Keeping the neutral dedicated to one branch circuit ensures proper overcurrent and fault protection for that circuit and prevents unintended energization or cross-talk between circuits. Therefore, the neutral must be used for only one branch circuit.