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Name the cable or conductor which connects the distributor to the consumer terminals
Service Mains
Feeders
Distributor
None of the above
Service Mains
Service mains are small-capacity cables that establish the final electrical connection between the supply company's distributor and the consumer's premises terminals (meter board). They are essentially the last link in the power distribution chain, designed specifically to carry the current required by an individual consumer.
Service mains are small-capacity cables that establish the final electrical connection between the supply company's distributor and the consumer's premises terminals (meter board). They are essentially the last link in the power distribution chain, designed specifically to carry the current required by an individual consumer.
VdropтАЛ=I├ЧRsmтАЛ тАФ where VdropтАЛ is the voltage drop in the service main, I is the current, and RsmтАЛ is the resistance of the service main conductor.
The electrical energy flows from the generating station through the transmission system to the substation, and then through feeders to distributors. A distributor taps into the supply for multiple loads. The service main connects at the tapping point of the distributor and delivers electricity to the consumer's cutout or energy meter, ensuring the potential at the consumer terminal is within the stipulated tolerance (e.g., ┬▒6% in India).
Service mains are strictly designed for the load requirement of a single consumer.
They typically operate at low voltage (e.g., 230V single-phase or 415V three-phase).
Placement can be overhead or underground depending on local utility regulations.
The cost of the service main is often borne by the consumer or regulated by the utility tariff.
Isolated connection allows for individual metering.
Easier maintenance without affecting the main distribution network.
Significant aggregate voltage drop when service mains are excessively long.
Prone to tampering or illegal tapping if not secured properly.
Residential electricity supply.
Commercial building metering installations.
Feeders are conductors of high current capacity connecting the substation to the distributor without any intermediate tapping.
Distributors are conductors from which tappings are taken for supply to the consumers.
The choice of service main size is determined by the connected load and permissible voltage drop as per the Indian Electricity Rules.
A is correct тАФ Service mains act as the final electrical connection between the distributor and the consumer premises.
Always remember the order of hierarchy in distribution: Substation -> Feeder -> Distributor -> Service Main -> Consumer load.