FIELD: electric power engineering; domestic and industrial electric water heaters. SUBSTANCE: method of protection against electric shock is effected through reduction of water electric potentials at electric water heater inlet and outlet due to earthing or neutralizing of interconnected elements; power supply line phase wire is connected to one output of voltage indicator with its second lead connected to above-mentioned elements; neutral wire of power-supply line is connected to extreme plates-electrodes located near inlet and outlet of electric water heater which is indicated by voltage indicator showing supply of mains voltage when its first lead is connected to plate-electrode adjacent to one of above-mentioned plates-electrodes, thus duplicating electric shock protection. EFFECT: high electric safety of electric water heater. 3 cl
