IEC IEC 60204-1 Edition 6.1 2021-09 CONSOLIDATEDVERSION FINALVERSION VERSIONFINALE colour inside Safety of machinery - Part 1: General requirements Sécurite des machines - Partie 1: Exigences generales ( IEC60204-1:2016+AMD1:2021CSV - 2 - @IEC2021 CONTENTS FOREWORD 10 INTRODUCTION 13 1 Scope.. .15 2 Normative references .16 3 Terms, definitions and abbreviated terms . 3.1 Terms and definitions 3.2 Abbreviated terms. .26 4 General requirements . 4.1 General. .26 4.2 Selection of equipment. .27 4.2.1 General .27 4.2.2 Switchgear.. 4.3 Electrical supply.. 4.3.1 General .28 4.3.2 AC supplies .28 4.3.3 DC supplies . .28 4.3.4 Special supply systems .28 4.4 Physical environment and operating conditions 4.4.1 General .... 4.4.2 Electromagnetic compatibility (EMC) 4.4.3 Ambient air temperature .29 4.4.4 Humidity 4.4.5 Altitude. .29 4.4.6 Contaminants. 29 4.4.7 lonizingandnon-ionizingradiation. .30 4.4.8 Vibration, shock, and bump. 4.5 Transportation and storage.. 4.6 Provisions for handling ..... ....30 5 Incoming supply conductor terminations and devices for disconnecting and switching off ... ...30 5.1 Incoming supply conductor terminations 5.2 Terminal for connection of the external protective conductor .. .31 5.3 Supply disconnecting (isolating) device.... .31 5.3.1 General ... .31 5.3.2 Type.. .31 5.3.3 Requirements .. 5.3.4 Operating means of the supply disconnecting device 5.3.5 Excepted circuits.... 5.4 Devices for removal of power for prevention of unexpected start-up .34 5.5 Devices forisolating 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 .. .35 6.2.1 General .35 6.2.2 Protection by enclosures IEC 60204-1:2016+AMD1:2021CSV - 3 - @IEC2021 6.2.3 Protection by insulation of live parts .37 6.2.4 Protection against residual voltages .37 6.2.5 Protection by barriers... 6.2.6 Protection by placing out of reach or protection by obstacles 6.3 Fault protection.... 6.3.1 General ..... 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 Protection of equipment.. ...40 7 7.1 General. .40 7.2 Overcurrent protection..... ..40 7.2.1 General . 7.2.2 Supply conductors .. 7.2.3 Power circuits ... 7.2.4 Control circuits.. 7.2.5 Socket outlets and their associated conductors.. .41 7.2.6 Lighting circuits... .41 7.2.7 Transformers .42 7.2.8 Location of overcurrent protective devices. 7.2.9 Overcurrent protective devices .... 7.2.10 Rating and setting of overcurrent protective devices 7.3 Protection of motors against overheating 7.3.1 General .42 7.3.2 Overload protection.. .43 7.3.3 Over-temperature protection.. .43 7.4 Protection against abnormal temperature .43 7.5 Protection against the effects of supply interruption or voltage reduction and subsequent restoration.. 7.6 ..44 Motor overspeed protection. 7.7 Additional earth fault/residual current protection .. .44 7.8 Phase sequence protection .. .44 7.9 Protection against overvoltages due to lightning and to switching surges... ..44 7.10 Short-circuit current rating ..... .....45 8 Equipotential bonding ...... 8.1 General.. 8.2 Protective bonding circuit. 8.2.1 General ......... 8.2.2 Protective conductors.... ...48 8.2.3 Continuityof theprotectivebondingcircuit... 8.2.4 Protective conductor connecting points... .50 8.2.5 ..50 Mobile machines .. 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..