In this paper electrical and electrochemical measurements of the organic coatings conducting electric current and able to work as anodes in cathodic protection of reinforced concrete have been presented. Evaluation of coating resistance as a function of graphite content was performed with the use of impedance measurements. On this basis a threshold of percolation of epoxide coating modified with electrographite was assessed. A current loading of conductive coatings was evaluated by potentiodynamic measurements. Basing on the performed measurements it has been stated that the minimum graphite content in the coating cannot be lower than 35%.