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Minimum distance of underground cables from the foundation of building should be
100 cm
50 cm
10 cm
5 cm
10 cm
According to the Indian Electricity Rules and CPWD specifications, underground cables must maintain a minimum horizontal clearance of 10 cm from the foundations of buildings or structures. This spacing prevents mechanical stress on the foundation and facilitates maintenance or fault localization without damaging the structural integrity.
According to the Indian Electricity Rules and CPWD specifications, underground cables must maintain a minimum horizontal clearance of 10 cm from the foundations of buildings or structures. This spacing prevents mechanical stress on the foundation and facilitates maintenance or fault localization without damaging the structural integrity.
dminтАЛтЙе10┬аcm тАФ Minimum clearance specification for cables from building structures
The principle involves ensuring electrical safety and mechanical clearance. By maintaining a 10 cm distance, cables are protected from potential vibrations, soil settling effects near the foundation, and structural loads, while simultaneously allowing workers to identify the cable path during excavation without violating building boundary codes.
Safety clearance is essential for preventing thermal damage to building footings.
Required to ensure that cable expansion/contraction does not exert pressure on concrete structures.
Maintains structural integrity and avoids legal disputes during property maintenance.
Protects civil structure from thermal effects
Easier to perform future excavation without structural risk
Requires precise site planning in congested residential areas
May require cable diversion if original design ignores structural footprints
Urban underground electrical distribution networks
Industrial plant cable routing
Residential complex power supply lines
While 10 cm is the minimum for foundations, different clearances apply for other utilities like water mains (typically 30 cm) or communication cables.
Option A (100 cm) is closer to the requirement for proximity to high-pressure water/gas mains.
C is correct тАФ The Indian standard mandate for the minimum clearance of underground cables from a building foundation is 10 cm.
In competitive exams, distinguish between 'vertical depth of burial' (typically 75-100 cm) and 'horizontal clearance from foundations' (10 cm) as they are frequently tested together.