Karur is not electrified at all. So no eloco can go via KRR. A diesel loco will haul till ED/MAS and after that eloco will be attached. I am travelling in this train in coming Sunday (/pnr/post/2194718), and will post the update.
Important Note:This website NEVER solicits for Money or Donations. Please beware of anyone requesting/demanding money on behalf of IRI. Thanks. Disclaimer: This website has NO affiliation with the Government-run site of Indian Railways. This site does NOT claim 100% accuracy of fast-changing Rail Information. YOU are responsible for independently confirming the validity of information through other sources.