For laying 22 to 33 kV cables, the minimum depth of cable trench should be:
- 0.45 meters
- 0.9 meters
- 1.05 meters
- 1.95 meters
Correct answer: 3. 1.05 meters
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Explanation: For laying 22 to 33 kV cables, the minimum depth of the cable trench is typically recommended to be 0.9 meters. This depth is necessary to ensure proper protection and insulation of the cables from various environmental factors, such as moisture, temperature variations, and mechanical damage. Adequate depth helps prevent accidental damage and ensures the safety and reliability of the electrical distribution system.
The depth of the cable trench is an important factor in the design and installation of underground cables. It is determined based on factors such as the voltage level of the cables, soil conditions, and local regulations. In the case of 22 to 33 kV cables, a depth of 0.9 meters is commonly specified to meet safety and performance standards.