IEC 60375 pdf download Conventions concerning electric and magnetic circuits 1 Scope This International Standard lays down rules for signs and reference directions and referencepolarities for electric currents and voltages in electric networks，as well as for thecorresponding quantities in magnetic circuits. ln Clauses 3 to 9,the time dependence is arbitrary. Clause 10 details the rules and recom-mendations for complex notation....