I have one small doubt. Always wanted to know this. But when i enter IRI, i forget it.
When i travel from SP Kovil to Chennai Park in EMU, as soon as train reaches outer of Tamabaram, fans gets switched off, and only few lights will be working for short interval of time and also vice versa. I have noticed the same in some place in between Tambaram and Chennai park stretch. Can anyone tell me why this happening? Is this related to overhead cable?