Question

Line that connects the distributor conductor at the nearest pole to the consumer's end is

• A. Secondary transmission lines
• B. Service mains
• C. Primary transmission lines
• D. Secondary distribution lines

Answer 1

The Correct Option is B

Electrical Power Distribution Systems: 

Electrical power distribution systems consist of several stages that ensure the flow of electricity from generating stations to consumers. These stages include generation, transmission, and distribution, with each stage serving a specific purpose in delivering power efficiently.

Stages of Power Distribution:

• Generation: Power is produced at generating stations.
• Transmission: High voltage transmission lines carry bulk power over long distances from generating stations to main substations.
• Primary Transmission Lines: The highest voltage transmission lines (e.g., 220 kV, 400 kV, 765 kV).
• Secondary Transmission Lines: Lower high voltage lines (e.g., 66 kV, 110 kV, 132 kV) connecting main substations to area substations.
• Distribution: From area substations, power is distributed to consumers at lower voltages.
• Primary Distribution Lines: Medium voltage lines (e.g., 11 kV, 33 kV), feeding distribution transformers.
• Secondary Distribution Lines: Low voltage lines (e.g., 400V three-phase, 230V single-phase in India), running along streets or areas, from which consumers are supplied.
• Service Connection: The final link from the secondary distribution line to the consumer's premises.

Service Mains:

The Service mains is the line that connects the secondary distribution line (distributor) at the nearest pole or underground junction to the consumer's premises (specifically, to the consumer's energy meter or main switch). This line serves as the final connection to the end-user.

Options Analysis:

• Option (a) Secondary transmission lines: These are high-voltage lines used for bulk power transmission, not for direct consumer connection.
• Option (b) Service mains: Correct. This is the line from the local distributor to the consumer's building, making it the final connection.
• Option (c) Primary transmission lines: These are very high-voltage lines designed for long-distance transmission of bulk power, not for direct consumer connection.
• Option (d) Secondary distribution lines (Distributors): These are the low-voltage lines running along neighborhoods, but the question asks specifically for the line from the distributor to the consumer, which is the service mains.

Conclusion:

The correct answer is Service mains, as it is the line that connects the distributor conductor at the nearest pole to the consumer's premises.

Answer:

Service mains