Brisk voting took place Thursday across Delhi's seven Lok Sabha constituencies, all of which were won by the Congress in 2009.
Queues were witnessed from the time polling stations opened at 7 a.m., and officials reported a steady turnover of voters.
There was visible enthusiasm especially among middle-aged voters and senior citizens.
Voting enthusiasm was not restricted to middle class and working class areas but was also seen in affluent localities as well.
The Election Commission said about 10 percent of Delhi's 12 million voters had exercised their franchise in the first two hours of balloting.
With the emergence of the Aam Aadmi Party, Delhi is witnessing a triangular fight also involving the Bharatiya Janata Party (BJP) and the Congress.
There are 150 candidates. There are 7,057,648 male and 5,657,785 female voters in Delhi besides 839 'others'.
The city has 11,763 polling stations, of which 417 have been declared "sensitive" and 90 "hyper sensitive" -- official euphemism to mean they are trouble prone.
Delhi will break all voting records, Chief Electoral Officer Vijay Dev said Thursday as polling for the seven Lok Sabha seats is on in the national capital.
"This time all records will be broken in Delhi... I am sure a lot of people, including youth and women, will come out and vote," he said after casting his vote.
There are over 12 million voters in Delhi.