What are the standard burial depths for low and high-voltage underground cables?

2025-08-14

The standard burial depth is a critical safety parameter that varies based on the cable's voltage, the soil type, and local regulations. A standard depth is required to protect the cable from mechanical damage and thermal stress. General guidelines are:

  • Low-Voltage (LV) Cables: A minimum depth of 600mm to 750mm (24 to 30 inches) is typically required.

  • High-Voltage (HV) Cables: These require a greater depth for safety, often buried at a minimum of 900mm to 1200mm (36 to 48 inches) or more.

It is vital to note that depths are often increased significantly under roadways, driveways, and other areas with heavy traffic. Always consult local regulations for precise depth requirements.

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