For feeding electrical loads, what is the recommended maximum voltage drop for branch circuits according to electrical codes?

For feeding electrical loads, the recommended maximum voltage drop for branch circuits according to electrical codes is 5 percent. This standard is primarily established to ensure that electrical equipment operates efficiently and effectively. When voltage drop exceeds this limit, it can lead to insufficient voltage at the load, potentially causing performance issues such as flickering lights, overheating, or even failure of equipment.

The 5 percent guideline allows for a reasonable balance between electrical efficiency and cost-effectiveness, ensuring that loads receive adequate voltage without unnecessarily oversized conductors, which would increase the installation costs. This value is also consistent with recommendations from the National Electrical Code (NEC) and other electrical standards, highlighting its importance in practical applications.