The Election Commission is likely to announce the dates for the Lok Sabha election Wednesday.
The term of the current Lok Sabha expires June 1. A new house has to be constituted by May 31.
An estimated 814 million voters will be eligible to vote, with 97.1 million new voters added since the 2009 election.
The "None of the Above" (NOTA) option will be given to voters -- for the first time in a parliamentary contest.
About 800,000 polling stations will be set up across the country, according to Election Commission sources.
Around 1.2 million electronic voting machines will be used in the election and another 250,000 have been ordered from public sector companies.
In 2009, there were 714 million voters and 671 million in 2004.
