A distribution box is a low-voltage electrical enclosure that receives incoming power and distributes it safely to multiple outgoing circuits through protective and switching devices such as MCBs, RCDs, RCBOs, fuses, isolators, busbars, neutral bars, earth bars, and surge. A distribution box is a low-voltage electrical enclosure that receives incoming power and distributes it safely to multiple outgoing circuits through protective and switching devices such as MCBs, RCDs, RCBOs, fuses, isolators, busbars, neutral bars, earth bars, and surge. The distribution cabinet needs to be grounded. Grounding is to ensure the safe and reliable operation of electrical equipment, and to avoid safety accidents caused by electrical faults. A floating door can zap a worker, even if the cabinet body is grounded. Whether you're a seasoned pro or just starting out, this comprehensive guide will give you practical. For example, for High And Low Voltage Distribution Cabinets, the distribution box needs to be grounded regardless of size. The grounding "bus" (grounding bus, PE bus) in the box is directly connected to the power ground wire or grounding system; 2. This helps to reduce the potential difference that exists between conductive parts and the earth. Equipment Protection: Grounding protects substation.