The National Electrical Code (NEC) provides comprehensive safety standards for electrical installations, including requirements for electrical panels (main service panels and subpanels or breaker box). NEC Article 408 covers switchboards, switchgear, and Panelboards installation. In this guide, we'll break down everything you need to know to install a distribution box correctly and confidently. Choose the right box based on environment (indoor/outdoor), load capacity, and durability. Check for proper IP/NEMA ratings and material quality. We'll explain what they are, the different panel types you'll encounter, NEC 408 requirements that govern their installation, and common applications for each type. You must make safety your top priority when working with low voltage distribution boxes. This section concentrates upon commonly used power distribution equipment: Panelboards, Switchboards, Low-Voltage Motor Control. Understanding power distribution panels is essential for anyone involved in electrical system design, installation, or maintenance. Whether you're upgrading your home's electrical service, designing a commercial facility, or managing an industrial power system, selecting and sizing the right.