Podcast
Questions and Answers
What is the maximum permissible earth resistance value (in Ohms) for copper cable screens and armour at stations to achieve the specified screening factor?
What is the maximum permissible earth resistance value (in Ohms) for copper cable screens and armour at stations to achieve the specified screening factor?
- 5
- 10 (correct)
- 20
- 1
For cables carrying 5 or more pairs of conductors, what minimum percentage of spare conductors should ideally be planned for future expansions?
For cables carrying 5 or more pairs of conductors, what minimum percentage of spare conductors should ideally be planned for future expansions?
- 10%
- 25% (correct)
- 20%
- 30%
Telecom cables should generally be laid within how many meters inside the railway boundary?
Telecom cables should generally be laid within how many meters inside the railway boundary?
- 1 (correct)
- 2
- 0.5
- 5
What is the minimum horizontal distance (in meters) telecom cables should be laid away from the nearest railway track and beyond the embankment?
What is the minimum horizontal distance (in meters) telecom cables should be laid away from the nearest railway track and beyond the embankment?
Cable markers should be provided along the cable route at nominal intervals of every how many meters?
Cable markers should be provided along the cable route at nominal intervals of every how many meters?
Under normal conditions, what is the minimum depth (in meters) at which telecom cables should be buried below the ground surface?
Under normal conditions, what is the minimum depth (in meters) at which telecom cables should be buried below the ground surface?
In exceptional cases with limited trench depth, what is the minimum distance (in meters) to be maintained between a cable and an OHE mast when cables are laid in concrete pipes?
In exceptional cases with limited trench depth, what is the minimum distance (in meters) to be maintained between a cable and an OHE mast when cables are laid in concrete pipes?
Near OHE masts, if the cable trench depth exceeds 0.5 meters, the nearest edge of the trench must be at least how many meters away from the OHE mast?
Near OHE masts, if the cable trench depth exceeds 0.5 meters, the nearest edge of the trench must be at least how many meters away from the OHE mast?
In the vicinity of OHE switching stations, what is the minimum distance (in meters) telecom cables should be laid away from station earthing?
In the vicinity of OHE switching stations, what is the minimum distance (in meters) telecom cables should be laid away from station earthing?
What is the minimum bending radius of aluminium sheathed armoured cables expressed as a multiple of the cable diameter?
What is the minimum bending radius of aluminium sheathed armoured cables expressed as a multiple of the cable diameter?
Flashcards
What should be determined while planning for cabling on a route?
What should be determined while planning for cabling on a route?
- Number of conductors and sizes. 2) Type of cable (quad/PIJF). 3) Allocation of quad on the 6Q including BPAC/IBS etc.
How should the actual route for taking the cables be decided upon?
How should the actual route for taking the cables be decided upon?
- Travelling/walking along the track. 2) Deciding upon the best alignment for the cable route.
Where should telecom cables be laid in relation to railway boundaries, tracks, and electrical cables?
Where should telecom cables be laid in relation to railway boundaries, tracks, and electrical cables?
- At least 1 meter inside the Railway boundary. 2) At least 2 m away from the nearest track and beyond embankment. 3) Separated by at least 1 m from the nearest electrical power cable.
At what intervals should cable markers be provided along the cable route, and where else?
At what intervals should cable markers be provided along the cable route, and where else?
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How deep should the cable be below the surface?
How deep should the cable be below the surface?
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What is the minimum distance between the cable and the OHE mast when the cable trench is shallow (0.5 m)?
What is the minimum distance between the cable and the OHE mast when the cable trench is shallow (0.5 m)?
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Outside station limits, how far should the cable be from the track?
Outside station limits, how far should the cable be from the track?
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What is the minimum bending radius for the cable?
What is the minimum bending radius for the cable?
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Study Notes
- What color should the EC socket and location box be painted?
- a) Black
- b) Yellow
- c) Black and Yellow
- d) Red
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