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Iec guide contents A contents A A B general - installed power methodology B rules and statutory regulations B de ?nition of voltage ranges B table B standard voltages between V and V IEC - B table B standard voltages above kV and not exceeding kV IEC - B

contents A contents A A B general - installed power methodology B rules and statutory regulations B de ?nition of voltage ranges B table B standard voltages between V and V IEC - B table B standard voltages above kV and not exceeding kV IEC - B regulations B standards B quality and safety of an electrical installation B initial testing of an installation B periodic check-testing of an installation B table B frequency of check-tests commonly recommended for an electrical installation B conformity with standards and speci ?cations of equipment used in the installation B motor heating and lighting loads B induction motors B table B power and current values for typical induction motors B direct-current motors B table B progressive starters with voltage ramp B table B progressive starters with current limitation B resistive-type heating appliances and incandescent lamps conventional or halogen B table B current demands of resistive heating and incandescent lighting conventional or halogen appliances B uorescent lamps and related equipment B table B current demands and power consumption of commonly-dimensioned uorescent lighting tubes at V V - Hz B table B current demands and power consumption of compact uorescent lamps at V V - Hz B discharge lamps B table B current demands of discharge lamps B power loading of an installation B installed power kW B installed apparent power kVA B table B estimation of installed apparent power B estimation of actual maximum kVA demand B table B simultaneity factors in an apartment block B table B factor of simultaneity for distribution boards IEC B table B factor of simultaneity according to circuit function B example of application of factors ku and ks B table B an example in estimating the maximum predicted loading of an installation the factor values used are for demonstration purposes only B contents - A Ccontents continued A B general - installed power continued power loading of an installation continued diversity factor B choice of transformer rating B table B IEC-standardized kVA ratings of HV LV -phase distribution transformers and corresponding nominal full-load current values B choice of power-supply sources B C HV LV distribution substations A - contents supply of power at high voltage C power-supply characteristics of high voltage distribution networks C table C relating nominal system voltages with corresponding rated system voltages r m s values C table C switchgear rated insulation levels C table C A transformers rated insulation levels in series I based on current practice other than in the United States of America and some other countries C table C B transformers rated insulation levels in series II based on current practice in the United States of America and some other countries C table C standard short-circuit current-breaking ratings extracted from table X IEC C di ?erent HV service connections C some operational aspects of HV distribution networks C consumers HV substations C procedures for the establishment of a new substation C substation protection schemes C protection against electric shocks and overvoltages C