Yes, You can file RTI Application to BESCOM (Bangalore Electricity supply company Ltd.) Please refer to the link i.e., http://bescom.org/rti-3/ to have a clear idea about filing RTI Application to them. BESCOM has mentioned the following on the above mentioned link as follows:
RTI Orders and Circulars
4 (1) (a) – Disclosure under List of Files
4 (1) (b) – Disclosure under Roles & Responsibilities
4(1)(b)(i-xvii) – Obligations of Public Authorities
List of PIOs / APIOs
Format of Application under RTI
First Appeal Application under section 19(1)
RTI Annual Report
RTI Act,2005
BESCOM has clearly mentioned designated PIO for various Sub Division, Division and Zonal Office respectively, which has made it so easy for the Applicants to look out for specific zone, division and sub division depending on their respective queries/matter and Offices as well. You may also check the format and prescribed RTI fee from the above mentioned link.