What is the maximum allowable voltage drop for a 277V circuit to keep it within a 3% limit?

To determine the maximum allowable voltage drop for a 277V circuit to remain within a 3% limit, you calculate 3% of 277V. The calculation is as follows:

0.03 x 277V = 8.31V

This value represents the maximum voltage drop permissible without exceeding the 3% limit. When rounded, this value can be approximated to 8.3V, which aligns perfectly with the provided choice.

This standardized practice is crucial in electrical installations to ensure efficient operation, minimize energy loss, and maintain safety standards. Keeping voltage drop within acceptable limits helps prevent potential issues related to equipment performance or overheating, ensuring longevity and reliability in electrical systems.