The standard laying depth for 11kV underground cables is a critical consideration for safety and operational efficiency, though it varies significantly by region, country, and specific installation environment. For instance, in some standards, the minimum depth from the ground surface to the top of the cable is specified as 600mm for footpaths and 900mm for agricultural land, while other standards may specify a nominal depth of 0.8m. These depths are influenced by factors such as:

• Soil Type and Conditions: The thermal properties of the soil are a key factor. Deeper burial in certain soils can lead to higher temperatures, impacting the cable's current-carrying capacity.

• Location: Depths vary based on whether the cable is under a road, footpath, or in unmade/agricultural ground, where different levels of mechanical protection are required.

• Local Regulations: Different national and regional authorities, such as SP Energy Networks or Northern Powergrid in the UK, have specific standards and depth requirements.

We recommend consulting local electrical codes and utility specifications to ensure compliance with the precise requirements of your project location.