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International standard protection against electric shock common aspects for installations and equipment

This is a preview - click here to buy the full publication INTERNATIONAL STANDARD IEC Edition - REDLINE VERSION BASIC SAFETY PUBLICATION colour inside Protection against electric shock ?? Common aspects for installations and equipment INTERNATIONAL ELECTROTECHNICAL COMMISSION ICS ISBN - - - - Warning Make sure that you obtained this publication from an authorized distributor Registered trademark of the International Electrotechnical Commission CThis is a preview - click here to buy the full publication ?? ?? CONTENTS IEC RLV ? IEC FOREW ORD Scope Normative references Terms and de ?nitions Fundamental rule of protection against electric shock General Normal conditions Single-fault conditions General Protection by two independent protective provisions Protection by an enhanced protective provision Special cases Additional protection Protection against electric burns Protection against physiological e ?ects without adverse health e ?ect General Muscular reaction E ?ects of touch current of discharge of electrostatic charges Thermal e ?ects Protective provisions elements of protective measures General Provisions for basic protection General Basic insulation Protective barriers or enclosures Obstacles Placing out of arm's reach Limitation of voltage Limitation of steady-state touch current and charge energy Potential grading Other provisions for basic protection Provisions for fault protection General Supplementary insulation Protective-equipotential-bonding Protective screening Indication and disconnection in high-voltage installations and systems Automatic disconnection of supply Simple separation between circuits Non-conducting environment Potential grading Other provisions for fault protection Enhanced protective provisions General Reinforced insulation Protective separation between circuits Limited current source CThis is a preview - click here to buy the full publication IEC RLV ? IEC ?? ?? Protective impedance device Other provisions for enhanced protection Provisions for additional protection Additional protection by residual current protective device RCD I ? n ? mA Additional protection by supplementary equipotential bonding Protective measures General Protection by automatic disconnection of supply Protection by double or reinforced insulation Protection by protective equipotential bonding Protection by electrical separation Protection by non-conducting environment low- voltage Protection by SELV system Protection by PELV system Protection by limitation of steady-state touch current and charge Additional protection Additional protection by residual current protective device RCD I ? n ? mA Additional protection by supplementary protective equipotential bonding Protection by other measures Co-ordination of between electrical equipment and of protective provisions within an electrical installation General Class equipment Insulation Class I equipment General Insulation Protective-equipotential-bonding Connection to the protective conductor Accessible surfaces of parts of insulating material Connection of a protective conductor Class II equipment General Insulation Protective bonding Marking Class III equipment General Voltages Protective bonding Marking Touch currents protective conductor currents leakage currents General Touch currents Protective conductor currents Other requirements Other e ?ects CThis is a preview - click here to buy the full publication ?? ?? IEC RLV ? IEC Safety and boundary clearances and warning labels hazard marking for high-voltage installations Functional earthing Special operating and servicing conditions General Devices to be operated manually and components intended to be replaced manually General Devices to be operated or components intended to be replaced by ordinary persons