On February 3 in the year 1925, the first Electric Multiple Unit (EMU) rake — the technical name of our local trains — ran in Mumbai under the 1500-volt Direct Current (DC) system. Today, this system will celebrate 91 years of its existence. However, its nonagenarian anniversary will be short lived, as by March this system will be eradicated from the country.

The Harbour line is the only network across the country  where trains, like this one, run on the 1,500-volt DC system. File pic