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While crossing the road the cable should be
Buried in trenches
Surrounded by sawdust to absorbs vibrations
Laid in conduits for pipes
None of above
Laid in conduits for pipes
When underground cables must cross a road, they are laid inside conduits or pipes to provide mechanical protection against heavy traffic loads and vibrations. This method allows for easy replacement or maintenance of the cable without excavating the road surface.
When underground cables must cross a road, they are laid inside conduits or pipes to provide mechanical protection against heavy traffic loads and vibrations. This method allows for easy replacement or maintenance of the cable without excavating the road surface.
P=AFтАЛ тАФ Pressure distribution where conduit reduces stress concentration on cable
dconduitтАЛ>dcableтАЛ тАФ Condition for safe cable installation inside protective ducting
The conduit acts as a rigid housing that distributes the compressive forces exerted by vehicles passing above. By separating the cable from the direct soil pressure and the impact of road traffic, the insulation of the cable is prevented from mechanical failure or crushing. This arrangement is a standard requirement in electrical installation codes for public works.
Protective conduits prevent mechanical damage from heavy traffic loads.
Easier maintenance is achieved by sliding the cable through the conduit.
Conduits help in maintaining uniform soil pressure distribution.
The depth of the conduit is typically specified based on road class (e.g., 1 meter deep).
Protection against mechanical impact and road vibrations.
Simplified replacement and future upgrades.
Prevents cable deformation under heavy traffic.
Increased installation costs compared to direct burial.
Need for careful alignment during road excavation.
Thermal dissipation may be slightly lower inside conduits.
Road crossings
Railway track crossings
Underground utility duct banks
Standard procedure dictates that the conduit should extend beyond the road edges to ensure complete coverage.
Option B is incorrect because sawdust is not a standard material for structural support or vibration absorption in modern electrical trenching.
C is correct тАФ Underground cables crossing roads are housed in conduits or pipes to ensure protection from crushing loads and traffic vibrations.
Always remember that protective piping is mandatory whenever a cable crosses a high-load area such as a highway or railway to ensure long-term reliability and minimize maintenance downtime.