What is the maximum voltage drop allowed for any branch circuit operating at 120 volts line-to-line, serving sensitive electronic equipment?

The maximum voltage drop allowed for branch circuits that are serving sensitive electronic equipment is typically set to ensure the proper functioning and longevity of the devices. The correct option indicates a maximum voltage drop of 1.5%, which is a widely accepted standard for circuits powering sensitive devices. This lower percentage helps to minimize the risk of performance issues or potential damage to the electronic equipment.

When sensitive electronics are powered, they can be particularly susceptible to fluctuations and reductions in voltage. Allowing only a 1.5% drop ensures that these devices receive adequate voltage for optimal operation and helps to prevent issues such as overheating, erratic performance, or premature failure that could be caused by inadequate voltage levels.

Higher percentages of allowed voltage drop could lead to detrimental effects on the performance and reliability of such equipment, hence the careful limit of 1.5%. In contrast, options that suggest higher percentage drops do not provide the necessary protections required for sensitive electronics.