The quality of electrical service requires that a customer's voltage is kept within an acceptable range.

• A. The voltage must be kept within an acceptable range.
• B. Voltage fluctuations are common and acceptable.
• C. Voltage is not monitored.
• D. Voltage is ignored for most customers.

Answer: (A)

Quality electrical service hinges on keeping voltage within a specified tolerance. Equipment and devices are designed to operate within a particular voltage range; when voltage stays within that range, motors start reliably, lights stay steady, and electronic gear isn’t stressed. Utilities actively monitor voltage and use regulation equipment—like transformer taps and voltage regulators—to keep any variations small and within the acceptable limits. That’s why the statement that voltage must be kept within an acceptable range is the correct one.

Fluctuations aren’t treated as acceptable limits, voltage monitoring isn’t optional, and voltage isn’t ignored for customers.