What is the recommended voltage drop limit for branch circuits according to the Code?

The recommended voltage drop limit for branch circuits is typically set at 3%. This guideline is aimed at ensuring the efficiency of electrical systems. When the voltage drop exceeds this limit, it can lead to decreased performance of electrical equipment and potentially cause overheating or improper functioning of devices.

The 3% guideline is based on balancing energy loss and ensuring that equipment operates safely and effectively. Maintaining this limit helps to reduce the likelihood of electrical issues that can arise from under-voltage conditions, which may impact devices such as lighting and motors that rely on a stable voltage supply to function correctly.

By following this recommended voltage drop limit, engineers and electricians can ensure that the electrical infrastructure remains reliable, performs optimally, and adheres to safety standards set forth in electrical codes. This practice also contributes to energy efficiency and can lower electricity costs over time by reducing losses in the system.