What main voltage would you typically expect in a motor starter bucket?

• A. Single-phase, 240 volts
• B. Three-phase, 480 volts
• C. Three-phase, 208 volts
• D. Four-phase, 480 volts

Answer: (B)

The main idea here is that motor starter buckets are fed by three-phase power, and for many industrial setups that voltage is 480 volts. Using three-phase power provides smooth starting torque and is standard for driving motors. At 480V, the current for a given motor power is lower than it would be at a lower voltage like 208V, which means smaller wiring, smaller contactors, and more compact starter hardware. That combination makes 480V three-phase a common, practical choice for a starter bucket in many plants. Other options aren’t as typical: 208V three-phase can be used for smaller motors or different facilities, single-phase 240V isn’t used to feed typical motor starters that handle three-phase motors, and a four-phase 480V system isn’t a standard configuration.