Designing Power Distribution Units (PDUs) involves adhering to several standards to ensure safety, reliability, and compatibility. What Is a Distribution Box? A distribution box — also called a distribution board, panel board, or breaker panel — is the central electrical supply hub of any building or facility. It divides incoming power into subsidiary circuits and provides a protective fuse or circuit breaker for each one. This section concentrates upon commonly used power distribution equipment: Panelboards, Switchboards, Low-Voltage Motor Control. Distributed energy resources (DERs) include residential and commercial rooftop solar installations, wind turbines and storage systems that serve a single household or an industrial facility. They can be described as generation sources located near load centres. You must make safety your top priority when working with low voltage distribution boxes. The. The IEC (International Electrotechnical Commission) and BS 7671 (British Standard for Electrical Installations) both provide essential requirements for electrical installations, including those for fuse boards like garage unit, consumer unit and distribution board. While the IEC 60364 standard.