Cabling NEN-EN-IEC 61439 standard
1
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Wire colors according to NEN-EN-IEC 60204-1 for control cabinets.
Color identification by using combinations of the colors indicated above is permitted, provided no confusion can arise and no GREEN or YELLOW is used, except in the two-color combination GREEN-YELLOW.
When using color codes for identification of current conductors, it is recommended that the following color codes be used:
- BLACK: AC and DC main power chains;
- RED: AC control power chains;
- BLUE: DC control power chains; (dark blue)
- ORANGE: power chains that need not be separated according to 5.3.5. (wires that carry strange voltage and may remain energized when the main switch of the cabinet is off. (Usually these are potential-free contacts that exit the cabinet go)
Exceptions to the above are allowed where insulation material is not available in the recommended colors (for example, in multicore cables).
2
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Color coding for main power wiring
There differences in requirements for coding cables and conductors. The NEN 1010 prescribes strict color coding. Thus the ground over the entire length is green/yellow, the neutral is blue and in the case of the three-phases, the colors brown/black/gray must be used. This applies to cabling of the installation outside the cabinet.
In the switch cabinet/distribution however, the color coding of the NEN-EN-IEC 61439 applies. And this is much less stringent. If, for example, a ground wire is mounted and the beginning and end of the wire can be clearly seen, then for example coding of one of the connection points is already sufficient. A green-yellow wire is not a mandatory (note: but is sensible in practice). Also the color coding of the ends of the wiring is allowed in the NEN-EN-IEC 61439 and the three-phase wires may all be black.