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What are the cables under the distribution box called

The cables under a distribution box are typically called low-voltage feeder or service cables, connecting the box to individual circuits or the underground distribution network.Overview

The cables running beneath a distribution box are part of the low-voltage electrical system that carries electricity from the distribution box to various branch circuits within a building or to customer service points. These cables are designed to safely handle the voltage supplied to residential, commercial, or industrial circuits, usually in the range of 120–240V for single-phase systems or 400–480V for three-phase systems .

Types of Cables
  1. Feeder Cables: These are the main cables that bring power from the distribution network or transformer to the distribution box. They are often insulated and rated for low-voltage distribution .
  2. Branch or Service Cables: These cables exit the distribution box and supply power to individual circuits, such as lighting, outlets, or appliances. They are connected to the busbars, neutral bars, and earth bars inside the box .
  3. Underground Residential Distribution (URD) Cables: In many urban areas, these low-voltage cables are installed in ducts or conduits under streets and connect to service boxes or manholes before reaching the distribution box .
Installation and Safety
  • The cables are typically insulated and color-coded for live, neutral, and earth conductors.
  • They are routed through conduits or ducts to protect against mechanical damage and moisture.
  • Proper connection to the distribution box ensures circuit protection via MCBs, RCDs, or fuses, preventing overloads and short circuits .
Summary

In essence, the cables under a distribution box are low-voltage feeder or service cables that form the link between the distribution network and the individual circuits in a building. They are critical for safe and reliable electricity distribution and are installed according to local electrical codes and standards .

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