Mechanical installation 35
Preparation of the ground
1. Make a hole for the foundation and cabling.
2. Use geotextile to prevent mixing of the installation gravel with the surrounding soil.
3. Put coarse gravel at the bottom of the hole and fine gravel at the top.
4. Compress the gravel and soil below the foundation
Constructing earthing electrode and earthing
Construct an earthing electrode around the megawatt station foundation.
1 Fine gravel on top
2 Coarse gravel
3 Geotextile
4 Compressed area, minimum 15000 x 4000 mm
5 Maximum 560 mm after compression
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