Electrical Exam Term
Panelboard
An assembly of buses, overcurrent devices, and enclosures that distributes power to branch circuits and feeders within a building.
Detailed Explanation
Panelboards (commonly called breaker panels or load centers) are the central distribution point for a building's electrical system. NEC Article 408 covers panelboard requirements. Key requirements include: maximum of 42 poles (overcurrent devices) per panel, proper working space clearances (NEC 110.26), circuit directory (labeling), and access/clearance requirements. Residential panels are typically rated 100A, 150A, or 200A.
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Practice QuestionEasy
Which of the following best describes the concept of Panelboard?
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