IEC IEC 60204-1 Edition6.12021-09 CONSOLIDATED VERSION FINALVERSION VERSION FINALE colour nside Safety of machinery - Part 1: General requirements Sécurité des machines - Partie 1: Exigences generales IEC 60204-1:2016-10+AMD1:2021-09 CSV(en-fr) IEC 60204-1:2016+AMD1:2021 CSV - 2 - @IEC2021 CONTENTS FOREWORD.. INTRODUCTION.... ..13 1 15 2 Normative references... 3 Terms, definitions and abbreviated terms .17 3.1 Terms and definitions... 3.2 Abbreviated terms . .26 4 General requirements . .26 4.1 General. .26 4.2 Selection of equipment. .27 4.2.1 General. .27 4.2.2 Switchgear..... 4.3 .28 4.3.1 General ..28 4.3.2 AC supplies ..28 4.3.3 DC supplies.. 4.3.4 Special supply systems .28 4.4 Physical environment and operating conditions .. .28 4.4.1 General ... .28 4.4.2 Electromagnetic compatibility (EMC) ..29 4.4.3 Ambientairtemperature... 4.4.4 Humidity ....... 4.4.5 Altitude... .29 4.4.6 Contaminants... .29 4.4.7 lonizing and non-ionizing radiation, ..30 4.4.8 4.5 Transportation and storage...... ..30 4.6 Provisions for handling ........ ...30 5 Incoming supply conductor terminations and devices for disconnecting and switching off..... 5.1 Incoming supply conductor terminations ... ..30 5.2 Terminal for connection of the external protective conductor . .31 5.3 Supply disconnecting (isolating) device.. ...31 5.3.1 General ..... 5.3.2 Type........ .31 5.3.3 Requirements .. .32 5.3.4 Operating means of the supply disconnecting device . ..32 5.3.5 Excepted circuits...... 5.4 Devices for removal of power for prevention of unexpected start-up .... 5.5 Devices for isolating electrical equipment ... ...34 5.6 Protection against unauthorized, inadvertent and/or mistaken connection... ...35 6 Protection against electric shock... ...35 6.1 General..... ..35 6.2 Basic protection ... 6.2.1 General .... 6.2.2 Protection byenclosures .36 IEC 60204-1:2016+AMD1:2021 CSV - 3 - @ IEC 2021 6.2.3 Protection by insulation of live parts .. .37 6.2.4 Protection against residual voltages , 6.2.5 Protection by barriers..... 6.2.6 Protection by placing out of reach or protection by obstacles .37 6.3 Fault protection .... ..37 6.3.1 General ... ..37 6.3.2 Prevention of the occurrence of a touch voltage.. 6.3.3 Protection by automatic disconnection of supply . 6.4 Protection by the use of PELV.... ..39 6.4.1 General requirements.. .39 6.4.2 Sources for PELV ..40 7 Protection of equipment.. ..40 7.1 General... .40 7.2 Overcurrent protection.... ..40 7.2.1 7.2.2 .40 7.2.3 Power circuits .. .41 7.2.4 Control circuits.... 7.2.5 Socket outlets and their associated conductors. 7.2.6 Lighting circuits........ 7.2.7 Transformers.. .42 7.2.8 Location of overcurrent protective devices .42 7.2.9 Overcurrent protective devices ... 7.2.10 Rating and setting of overcurrent protective devices 7.3 Protection of motors against overheating ..... .42 7.3.1 General .... .42 7.3.2 Overload protection... 7.3.3 Over-temperatureprotection... 7.4 Protection against abnormal temperature.. 7.5 Protection against the effects of supply interruption or voltage reduction and subsequent restoration... .44 7.6 Motor overspeed protection .... ..44 7.7 Additionalearthfault/residual current protection.. 7.8 7.9 Protection against overvoltages due to lightning and to switching surges........44 7.10 Short-circuit current rating .... .45 8 Equipotential bonding .. ..46 8.1 General. .46 8.2 Protective bonding circuit . .48 8.2.1 General .... ..48 8.2.2 Protective conductors...... 8.2.3 Continuity of the protective bonding circuit........ 8.2.4 Protective conductor connectingpoints....... ...50 8.2.5 Mobile machines.... ...50 8.2.6 Additional requirements for electrical equipment having earth leakage currents higher than 10 mA ... 8.3 Measures to restrict the effects of high leakage current............. 8.4 Functional bonding...... .51 9 Control circuits and control functions.... ..51 IEC 60204-1:2016+AMD1:2021 CSV - 4 - @IEC2021 9.1 Control circuits. .51 9.1.1 Control circuit supply.. ..51 9.1.2