What type of breaker is typically used in a split-bus panel?

• A. Single-pole breaker
• B. Double-pole breaker
• C. Triple-pole breaker
• D. Quad-pole breaker

Answer: (B)

A split-bus panel typically uses a double-pole breaker to manage the distribution of power in a residential electrical system. This type of panel is designed with two separate bus bars, allowing for a more efficient distribution of electricity to different circuits without requiring a main breaker for every circuit.

The double-pole breaker is essential because it connects to both halves of the split-bus system, providing 240 volts to larger appliances or circuits that require more power, such as electric stoves or water heaters. The presence of double-pole breakers in split-bus panels is critical for ensuring that both sides of the panel receive the necessary voltage while maintaining maximum safety and efficiency in the electrical system.

In contrast, a single-pole breaker would only serve a 120-volt circuit and would not be able to tap into the split-bus configuration effectively, while triple-pole and quad-pole breakers are less common in residential applications and are primarily used in commercial settings or specialized cases requiring three or four phases of power.