How to understand the third paragraph of INTRODUCTION

The third paragraph of introduction as below:
This standard takes into account the requirements of IEC 60364 as far as possible so that there is compatibility with the wiring rules when the appliance is connected to the supply mains. However, national wiring rules may differ.

IEC 60364-1 Low-voltage electrical installations – Part 1: Fundamental principles, assessment of general characteristics, definitions

Gives the rules for the design, erection, and verification of electrical installations. The rules are intended to provide for the safety of persons, livestock and property against dangers and damage which may arise in the reasonable use of electrical installations and to provide for the proper functioning of those installations. IEC 60364-1 applies to the design, erection and verification of electrical installations such as those of a) residential premises; b) commercial premises; c) public premises; d) industrial premises; e) agricultural and horticultural premises; f) prefabricated buildings; g) caravans, caravan sites and similar sites; h) construction sites, exhibitions, fairs and other installations for temporary purposes; i) marinas; j) external lighting and similar installations; k) medical locations; l) mobile or transportable units; m) photovoltaic systems; n) low-voltage generating sets. IEC 60364-1 covers a) circuits supplied at nominal voltages up to and including 1 000 V a.c. or 1 500 V d.c.; b) circuits, other than the internal wiring of apparatus, operating at voltages exceeding 1 000 V and derived from an installation having a voltage not exceeding 1 000 V a.c., for example, discharge lighting, electrostatic precipitators; c) wiring systems and cables not specifically covered by the standards for appliances; d) all consumer installations external to buildings; e) fixed wiring for information and communication technology, signalling, control and the like (excluding internal wiring of apparatus); f) the extension or alteration of the installation and also parts of the existing installation affected by the extension or alteration.

IEC 60364 has been established by engineering experts of all countries in the world comparing their experience at an international level. Currently, the safety principles of IEC 60364 series, IEC 61140, 60479 series and IEC 61201 are the fundamentals of most electrical standards in the world (see table below).

IEC 60038IEC standard voltages
IEC 60051 seriesDirect acting indicating analogue electrical measuring instruments and their accessories
IEC 60071-1Insulation co-ordination – Definitions, principles and rules
IEC 60076-1Power transformers – General
IEC 60076-2Power transformers – Temperature rise for liquid immersed transformers
IEC 60076-3Power transformers – Insulation levels, dielectric tests and external clearances in air
IEC 60076-5Power transformers – Ability to withstand short-circuit
IEC 60076-7Power transformers – Loading guide for oil-immersed power transformers
IEC 60076-10Power transformers – Determination of sound levels
IEC 60076-11Power transformers – Dry-type transformers
IEC 60076-12Power transformers – Loading guide for Dry-type power transformers
IEC 60146-1-1Semiconductor converters – General requirements and line commutated converters – Specifications of basic requirements
IEC 60255-1Measuring relays and protection equipment – Common requirements
IEC 60269-1Low-voltage fuses – General requirements
IEC 60269-2Low-voltage fuses – Supplementary requirements for fuses for use by authorized persons (fuses mainly for industrial application) – Examples of standardized systems of fuses A to K
IEC 60282-1High-voltage fuses – Current-limiting fuses
IEC 60287-1-1Electric cables – Calculation of the current rating – Current rating equations (100% load factor) and calculation of losses – General
IEC 60364-1Low-voltage electrical installations – Fundamental principles, assessment of general characteristics, definitions
IEC 60364-4-41Low-voltage electrical installations – Protection for safety – protection against electric shock
IEC 60364-4-42Low-voltage electrical installations – Protection for safety – Protection against thermal effects
IEC 60364-4-43Low-voltage electrical installations – Protection for safety – Protection against overcurrent
IEC 60364-4-44Low-voltage electrical installations – Protection for safety – Protection against voltage disturbances and electromagnetic disturbances
IEC 60364-5-51Low-voltage electrical installations – Selection and erection of electrical equipment – Common rules
IEC 60364-5-52Low-voltage electrical installations – Selection and erection of electrical equipment – Wiring systems
IEC 60364-5-53Low-voltage electrical installations – Selection and erection of electrical equipment – Isolation, switching and control
IEC 60364-5-54Low-voltage electrical installations – Selection and erection of electrical equipment – Earthing arrangements and protective conductors
IEC 60364-5-55Low-voltage electrical installations – Selection and erection of electrical equipment – Other equipment
IEC 60364-5-56Low-voltage electrical installations – Selection and erection of electrical equipment – Safety services
IEC 60364-6Low-voltage electrical installations – Verification
IEC 60364-7-701Low-voltage electrical installations – Requirements for special installations or locations – Locations containing a bath or shower
IEC 60364-7-702Low-voltage electrical installations – Requirements for special installations or locations – Swimming pools and fountains
IEC 60364-7-703Low-voltage electrical installations – Requirements for special installations or locations – Rooms and cabins containing sauna heaters
IEC 60364-7-704Low-voltage electrical installations – Requirements for special installations or locations – Construction and demolition site installations
IEC 60364-7-705Low-voltage electrical installations – Requirements for special installations or locations – Agricultural and horticultural premises
IEC 60364-7-706Low-voltage electrical installations – Requirements for special installations or locations – Conducting locations with restrictive movement
IEC 60364-7-708Low-voltage electrical installations – Requirements for special installations or locations – Caravan parks, camping parks and similar locations
IEC 60364-7-709Low-voltage electrical installations – Requirements for special installations or locations – Marinas and similar locations
IEC 60364-7-710Low-voltage electrical installations – Requirements for special installations or locations – Medical locations
IEC 60364-7-711Low-voltage electrical installations – Requirements for special installations or locations – Exhibitions, shows and stands
IEC 60364-7-712Low-voltage electrical installations – Requirements for special installations or locations – Solar photovoltaic (PV) power supply systems
IEC 60364-7-713Low-voltage electrical installations – Requirements for special installations or locations – Furniture
IEC 60364-7-714Low-voltage electrical installations – Requirements for special installations or locations – External lighting installations
IEC 60364-7-715Low-voltage electrical installations – Requirements for special installations or locations –
Extra-low-voltage lighting installations
IEC 60364-7-717Low-voltage electrical installations – Requirements for special installations or locations –
Mobile or transportable units
IEC 60364-7-718Low-voltage electrical installations – Requirements for special installations or locations – Communal facilities and workplaces
IEC 60364-7-721Low-voltage electrical installations – Requirements for special installations or locations – Electrical installations in caravans and motor caravans
IEC 60364-7-722Low-voltage electrical installations – Requirements for special installations or locations – Supplies for electric vehicles
IEC 60364-7-729Low-voltage electrical installations – Requirements for special installations or locations – Operating or maintenance gangways
IEC 60364-7-740Low-voltage electrical installations – Requirements for special installations or locations – Temporary electrical installations for structures, amusement devices and booths at fairgrounds, amusement parks and circuses
IEC 60364-7-753Low-voltage electrical installations – Requirements for special installations or locations – Heating cables and embedded heating systems
IEC60364-8-1Low-voltage electrical installations – Energy efficiency
IEC60364-8-82Low-voltage electrical installations – Functional aspects – Prosumer’s low-voltage electrical installations
IEC 60445Basic and safety principles for man-machine interface, marking and identification – Identification of equipment terminals, conductors terminations and conductors
IEC 60479-1Effects of current on human beings and livestock – General aspects
IEC 60479-2Effects of current on human beings and livestock – Special aspects
IEC 60479-3Effects of current on human beings and livestock – Effects of currents passing through the body of livestock
IEC 60529Degrees of protection provided by enclosures (IP code)
IEC 60644Specification for high-voltage fuse-links for motor circuit applications
IEC 60664Insulation coordination for equipment within low-voltage systems – all parts
IEC 60715Dimensions of low-voltage switchgear and controlgear. Standardized mounting on rails for mechanical support of electrical devices in switchgear and controlgear installations.
IEC 60724Short-circuit temperature limits of electric cables with rated voltages of 1 kV (Um = 1.2 kV) and 3 kV (Um = 3.6 kV)
IEC 60755General requirements for residual current operated protective devices
IEC 60787Application guide for the selection of high-voltage current-limiting fuses-link for transformer circuit
IEC 60831-1Shunt power capacitors of the self-healing type for a.c. systems having a rated voltage up to and including 1000 V – Part 1: General – Performance, testing and rating – Safety requirements – Guide for installation and operation
IEC 60831-2Shunt power capacitors of the self-healing type for a.c. systems having a rated voltage up to and including 1000 V – Part 2: Ageing test, self-healing test and destruction test
IEC 60947-1Low-voltage switchgear and controlgear – General rules
IEC 60947-2Low-voltage switchgear and controlgear – Circuit-breakers
IEC 60947-3Low-voltage switchgear and controlgear – Switches, disconnectors, switch-disconnectors and fuse-combination units
IEC 60947-4-1Low-voltage switchgear and controlgear – Contactors and motor-starters – Electromechanical contactors and motor-starters
IEC 60947-6-1Low-voltage switchgear and controlgear – Multiple function equipment – Transfer switching equipment
IEC 61000 seriesElectromagnetic compatibility (EMC)
IEC 61140Protection against electric shocks – common aspects for installation and equipment
IEC 61201Use of conventional touch voltage limits – Application guide
IEC/TR 61439-0Low-voltage switchgear and controlgear assemblies – Guidance to specifying assemblies
IEC 61439-1Low-voltage switchgear and controlgear assemblies – general rules
IEC 61439-2Low-voltage switchgear and controlgear assemblies – power switchgear and controlgear assemblies
IEC 61439-3Low-voltage switchgear and controlgear assemblies – distribution boards intended to be operated by ordinary persons (DBO)
IEC 61439-4Low-voltage switchgear and controlgear assemblies – Particular requirements for assemblies for construction sites (ACS)
IEC 61439-5Low-voltage switchgear and controlgear assemblies – Assemblies for power distribution in public networks
IEC 61439-6Low-voltage switchgear and controlgear assemblies – Busbar trunking systems (busways)
IEC 61557-1Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures – General requirements
IEC 61557-8Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures – Insulation monitoring devices for IT systems
IEC 61557-9Electrical safety in low voltage distribution systems up to 1000 V a.c. and 1500 V d.c. – Equipment for testing, measuring or monitoring of protective measures – Equipment for insulation fault location in IT systems
IEC 61557-12Electrical safety in low voltage distribution systems up to 1 000 V a.c. and 1 500 V d.c. – Equipment for testing, measuring or monitoring of protective measures – Performance measuring and monitoring devices (PMD)
IEC 61558-2-6Safety of transformers, reactors, power supply units and similar products for supply voltages up to 1100 V – Particular requirements and test for safety isolating transformers and power supply units incorporating isolating transformers
IEC 61643-11Low-voltage surge protective devices – Surge protective devices connected to low-voltage power systems – Requirements and test methods
IEC 61643-12Low-voltage surge protective devices – Surge protective devices connected to low-voltage power distribution systems – Selection and application principles
IEC 61643-21Low voltage surge protective devices – Surge protective devices connected to telecommunications and signalling networks – Performance requirements and testing methods
IEC 61643-22Low-voltage surge protective devices – Surge protective devices connected to telecommunications and signalling networks – Selection and application principles
IEC 61921Power capacitors – Low-voltage power factor correction banks
IEC 61936-1Power installations exceeding 1 kV a.c. – Part 1: Common rules
IEC 62271-1High-voltage switchgear and controlgear – Common specifications
IEC 62271-100High-voltage switchgear and controlgear – Alternating-current circuit-breakers
IEC 62271-101High-voltage switchgear and controlgear – Synthetic testing
IEC 62271-102High-voltage switchgear and controlgear – Alternating current disconnectors and earthing switches
IEC 62271-103High-voltage switchgear and controlgear – Switches for rated voltages above 1 kV up to and including 52 kV
IEC 62271-105High-voltage switchgear and controlgear – Alternating current switch-fuse combinations for rated voltages above 1 kV up to and including 52 kV
IEC 62271-200High-voltage switchgear and controlgear – Alternating current metal-enclosed switchgear and controlgear for rated voltages above 1 kV and up to and including 52 kV
IEC 62271-202High-voltage switchgear and controlgear – High-voltage/low voltage prefabricated substations
IEC 62305-1Protection against lightning – Part 1: General principles
IEC 62305-2Protection against lightning – Part 2: Risk management
IEC 62305-3Protection against lightning – Part 3: Physical damage to structures and life hazard
IEC 62305-4Protection against lightning – Part 4: Electrical and electronic systems within structures
IEC 62586-2Power quality measurement in power supply systems – Part 2: Functional tests and uncertainty requirements
IEC TS 62749Assessment of power quality – Characteristics of electricity supplied by public networks

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