ELECTRC2 (ver 2.0) Abandoned Freeware ELECTRC2 is a useful program for the do-it-yourself home electrician. It performs common electrical contracting calculations such as: Power/voltage/current/resistance of resistive loads. Lighting fixtures (using the zonal cavity method). Conduit size for combination of different wire sizes & types. Voltage drop for various loads, voltages and run lengths. Required wire size based on allowable voltage drops. Cost to operate various loads at different kwh charges.