What is the maximum allowable voltage drop on feeders or branch circuits?

The correct maximum allowable voltage drop on feeders or branch circuits is 3%. This standard is established to ensure that electrical systems operate efficiently without significant losses that could affect performance. A voltage drop exceeding this threshold can lead to equipment malfunction or even damage, as devices are designed to operate within a certain voltage range. Additionally, excessive voltage drops can impact the overall efficiency of the electrical system, leading to increased energy costs and decreased reliability.

While options above and below this value indicate different tolerances, the 3% limit strikes a balance between operational integrity and cost-effectiveness, making it the standard for many applications in the electrical industry. Understanding this limit is crucial for professionals in the field to ensure safe and efficient electrical installations.