What is a "dead front" panelboard?

A "dead front" panelboard is characterized by having enclosed electrical components that are safely shielded from direct contact. This design minimizes the risk of electrical shock to users, as the live parts are not exposed. The term "dead front" refers to the fact that no live components are accessible from the front of the panel; instead, any necessary maintenance or interaction with the electrical components requires the removal of covers or doors, ensuring a safer environment.

This design is essential for compliance with electrical safety standards and regulations, as it protects both users and maintenance personnel from potential hazards. In contrast, the other options describe characteristics that do not fit this definition. For instance, a panelboard with exposed components would present safety risks, and one designed for outdoor use might not inherently feature the enclosed characteristics of a dead front. Additionally, while panelboards used for high voltage can indeed be dead front, the term itself does not exclusively refer to high-voltage applications. Therefore, option C accurately captures the defining feature of a dead front panelboard.