IEC-60364-1:2001 pdf download

IEC-60364-1:2001 pdf download.Electrical installations of buildings – Part 1: Fundamental principles, assessment of general characteristics, definitions.
IEC 60364-4-43:2001, Electrical installations of buildings — Part 4-43: Protection for safety — Protection against overcurrent
IEC 60364-4-44:2001, Electrical installations of buildings — Part 4-44: Protection for safety — Protection against electromagnetic and voltages disturbances
lEG 60364-5.51:2001, Electrical installations of buildings — Part 5-51: Selection and erection of electrical equipment — Common rules
IEC 60364-5-52:2001, Electrical installations of buildings — Part 5-52: Selection and erection of electrical equipment — Wiring systems
lEG 60364-5-53:2001, Electrical installations of buildings — Part 5-53: Selection and erection of electrical equipment — Isolation, switching and control
IEC 60364-5-54. Electrical installations of buildings — Part 5-54: Selection and erection of electrical equipment — Earthing arrangements 3
IEC 60364-5-55:2001, Electrical installations of buildings — Part 5-55: Selection and erection of electrical equipment — Other equipment
IEC 60446:1999, Basic and safety principles for man.machine interface, marking and identification — Identification of conductors by colours or numerals
lEG 60617-11:1996. Graphical symbols for diagrams — Part II: Architectural and topographical installation plans and diagrams
lEG 60721 (all parts). Classification of environmental conditions
13 Fundamental principles
NOTE Where countries not yal haying national regulations to, electrical installations d.eni it necessary to eatabtisti legal requirements icr this purpose, it is recommended that such requirements be limited to tundamental principtes which are not subject to frequent moditicalion on account of tecflnecal development The contents ot claus. 13 may be used as a basis tot such legislation.
131 Protection for safety
131.1 General
The requirements stated in this subclause are intended to ensure the safety of persons. livestock and property against dangers and damage which may arise in the reasonable use of electrical installations.
NOTE In electrical installations. two major types 01 risk exist:
— currents;
— excessive temperatures likely to cause burns, tires and other lntunotis ettecls.
131.2 Protection against electric shock
131.2.1 Protection against direct contact
Persons and livestock shall be protected against dangers that may arise from contact with live parts of the Installation.
This protection can be achieved by one of the following methods:
— preventing a current from passing through the body of any person or any livestock;
— limiting the current which can pass through a body to a value lower than the shock current.
131.2.2 Protection agaInst indirect contact
Persons and livestock shall be protected against dangers that may arise from contact with
exposed-conductive-parts in case of a fault.
This protection can be achieved by one of the following methods:
— preventing a fault current from passing through the body of any person or any livestock;
— hmiting the fault current which can pass through a body to a value lower than the shock current:
– automatic disconnection of the supply In a determined time on the occurrence of a fault likely to cause a current to flow through a body in contact with exposed-conductive-parts. where the value of that current is equal to or greater than the shock current.
NOTE In connection with the protection against indirect contact, the application of the method of equipotenlial bonding is one of the iniporlant principles br satety
131.3 Protection against thermal effects
The electrical installation shall be so arranged that there is no risk of ignition of ftammable materials due to high temperature or electric arc. In addition, during normal operation of the electrical equipment, there shall be no risk of persons or livestock suffering burns.
131.4 Protection against overcurrent
Persons or livestock shall be protected against injury and property shall be protected against damage due to excessive temperatures or electromechanical stresses caused by any overcurrents likely to arise in live conductors.
This protection can be achieved by one of the following methods:
— automatic disconnection on the occurrence of an overcurrent before this overcurrent attains a dangerous value taking into account its duration;
— limiting the maximum overcurrent to a safe value and duration.
131.5 Protection against fault currents
Conductors, other than live conductors, and any other parts intended to carry a fault current shall be capable of carrying that current without attaining an excessive temperature.
NOTE I Particular attention Should be given to earth lault Currents and l.akage current
NOTE 2 For live Conductors. compliance with 131 .4 assures their protection against overcurrenla caused by faults,
131.6 Protection against overvoltage
131.6.1 Persons or livestock shall be protected against injury and property shall be protected against any harmful effects as a consequence of a fault between live parts of circuits supplied at different voltages.