Do not install panelboards in the face-up or face-down position [Sec. The Code provides the minimum requirements for the practical safeguarding of persons and property. 8 essential formulas with worked examples - Ohm's Law, Watt's Law, voltage drop, transformer ratio. A printable 2-page reference card sent to your inbox. A distribution box is the heart of any electrical system. This guide covers split load vs dual RCD vs RCBO board configurations, circuit arrangement and allocation, BS 7671 labelling requirements, type testing under BS EN 61439, SPD installation, wiring best practice, and the common. Electrical panels, also known as breaker boxes or distribution boards, are critical components in our electrical systems.