National Grid Niagara Mohawk Power Corporation INVESTIGATION AS TO THE PROPRIETY OF PROPOSED ELECTRIC TARIFF CHANGES Testimony and Exhibits of: Rate Design, Customer and Markets Panel Exhibits __ (RDCM-2) through (RDCM-5), Schedules 1 through 5 Book 21 January 29, 2010 Submitted to: New York Public Service Commission Docket No. 10-E-____ Submitted by: