1 - designation of the current circuit; 2 - internal code for designation of the scheme; 3 - current flows in the direction of the arrow; 4 - shielded cable; 5 - the circuit continues on another diagram at number 6; 6 - plug symbol; 7 - cable color code (cable harness symbol); 8 - number of mass connection; 9 - plug code; 10 - operational state of the circuit breaker