IEC 60445:2021 pdf free download Basic and safety principles for man-machine interface, marking and identification – Identification of equipment terminals, conductor terminations and conductors
1 Scope
This document applies to the identification and marking of terminals of electrical equipmentsuch as resistors，fuses,relays,contactors，transformers，rotating machines and,whereverapplicable, to combinations of such equipment (e.g. assemblies), and it also applies to theidentification of terminations of certain designated conductors. lt also provides general rules forthe use of certain colours or alphanumeric notations to identify conductors with the aim ofavoiding ambiguity and ensuring safe operation.These conductor colours and alphanumericnotations are intended to be applied on cores, busbars, and electrical equipment, and in cablesor installations.
This basic safety publication focusing on safety essential requirements is primarily intended foruse by technical committees in the preparation of standards in accordance with the principleslaid down in IEC Guide 104 and lsonEc Guide 51.
lt is not intended for use by manufacturers or certification bodies. One of the responsibilities ofa technical committee is, wherever applicable, to make use of basic safety publications in thepreparation of its publications. The requirements of this basic safety publication will not applyunless specifically referred to or included in the relevant publications.
2Normative references
The following documents are referred to in the text in such a way that some or all of their contentconstitutes requirements of this document.For dated references,only the edition cited applies.For undated ‘references,the latest edition of the referenced document (including anyamendments) applies.
IEC 60417，Graphical symbols for use on equipment (available at http:/www.graphical-symbols.infolequipment)
IEC 60617,Graphical symbols for diagrams (available at http:/lstd.iec.chliec60617)
3Terms and definitions
For the purposes of this document, the following terms and definitions apply.
ISo and lEC maintain terminological databases for use in standardization at the followingaddresses:
. IEC Electropedia: available at http://www.electropedia.orgl
. Iso Online browsing platform: available at http://www.iso.orglobpNOTE The terms are sorted in alphabetical order in the English language.
3.1
earthing
grounding, US
electric connections between conductive parts and local earth
[SOURCE: IEC 60050-1 95:2021 , 1 95-01 -24]
3.2
earthed protective bonding conductor
protective bonding conductor which has a conductive path to local earth
3.3
electrical equipment
item used for generation, conversion, transmission, distribution or utilization of electric energy Note 1 to entry: Examples of such items are electric machines, transformers, switchgear and controlgear,measuring instruments, protective devices, wiring systems, current-using equipment.
[SOURCE: IEC 60050-826:—, 826-1 6-01 ]
3.4
electrical safety
freedom from risk that is not tolerable and which is caused by electricity
[SOURCE: IEC 60050-1 95:2021 , 1 95-01 -20]
3.5
equipotential bonding
set of electric connections intended to achieve equipotentiality between conductive parts
[SOURCE: IEC 60050-1 95:2021 , 1 95-01 -1 0]IEC 60445:2021 pdf free download
IEC 60445:2021 pdf free download
