IEC 60445:2010 pdf – Basic and safety principles for man-machine interface, marking andidentification – ldentification of equipment terminals, conductor terminations and conductors.
Green-and-yellow is the only colour combination recognized for identifying the protective conductor,
The colour combination green-and-yellow shall be such that, on any 15 mm length of the conductor where colour coding is applied, one of these colours covers at least 30 % and not more than 70 % of the surface of the conductor, the other colour covering the remainder of that surface,
If bare conductors, used as protective conductors, are provided with colouring they shall be coloured green-and-yellow, either throughout the whole length of each conductor or in each compartment or unit or at each accessible position. If adhesive tape is used, only bi-coloured tape shall be applied.
NOTE 3 Where the protective conductor can be easily identified by it. shape. Construction or pos4eon, for exampl, a concentric conductor. colour coding throughout 1, length is not n.c.ssary but he .nds or accessible
positions ihould be clearly identified by the graphical symbol \“ or the bi-colour combination gr..n-and-yeliow or the alphanumeric notation PE.
NOTE 4 II extraneous conductive parts are used as a PE conductor identillcation by colours is not necessary.
6.3.3 PEN conductors
PEN conductors, when insulated, shall be marked by one of the following methods:
— green-and-yellow throughout their length with, in addition, blue markings at the terminations; or
– blue throughout thetr length with, in addition, green-and-yellow markings at the terminations.
NOTE I The choice of method or methods to be applied within a country should be mad, by the relevant committees and not on Individual basis.
NOTE 2 The additional blue markings at the termination may be omitted once either of the following two indents is met
— in electrical equipment. If relevant requirements are included in specific product standards or within a country;
— in case of wiring systems, for example thos, used in Industry, if decided by the relevant committee
6.3.4 PEL conductors
PEL conductors, when insulated, shall be marked green-and-yellow throughout their length with, in addition, blue markings at their terminations.
NOTE The additional blue markings at the termination may be omitted once either of the following two indents is met
— in electrical equipment. if relevant requirements are Included in specific product standards or within a country;
— in case of wiring systems. for example those used In industry, if decided by the relevant committee.
If confusion with a PEN or PEM conductor is likely, the alphanumeric designation as given in 7.3,5 shall be indicated at their terminations.
6.3.5 PEM conductors
PEM conductors, when insulated, shall be marked green-and-yellow throughout their length with, in addition, blue markings at their terminations.
NOTE The additional blue markings at the termination may be omitted once either of the following Iwo indents is met
7.3 Identification of certain designated conductors
7.3.1 General
Equipment terminals which are intended to be connected directly or indirectly to certain designated conductors, and terminations of certain designated conductors shall be marked with reference letters or graphical symbols or both reference letters and graphical symbols according to Table Al.
7.3.2 Neutral conductor
The alphanumeric identification of a neutral conductor shall be ‘N’
7.3.3 ProtectIve conductor
The alphanumeric identification of a protective conductor shall be PE. This identification also applies for a protective earthing conductor.
7.3.4 PEN conductor
The alphanumeric identification of a PEN conductor shall be PEN’.
7.3.5 PEL conductor
The alphanumeric identification of a PEL conductor shall be PEL.
7.3.6 PEM conductor
The alphanumeric identification of a PEM conductor shall be ‘PEM.
7.3.7 Protective bonding conductor
The alphanumeric identification of a protective bonding conductor shall be ‘PB’.
7.3.8 Protective bonding conductor earthed
If it is necessary to distinguish between a protective bonding conductor earthed and a protective bonding conductor unearthed, the alphanumeric identification of a protective bonding conductor earthed shall be ‘PBE’,
7.3.9 Protective bonding conductor unearthed
It it is necessary to distinguish between a protective bonding conductor earthed and a protective bonding conductor unearthed, the alphanumeric identification of a protective bonding conductor unearthed shall be ‘PBLJ’.
7.3.10 Functional earthing conductor
The alphanumeric Identification of a functional earthing conductor shall be ‘FE’
7.3.11 Functional bonding conductor
The alphanumeric identification of a functional bonding conductor shall be ‘PB.
7.3.12 Mid-poInt conductor
The alphanumeric identification of a mid-point conductor shall be ‘M’.