Hello Christian,
> I have a doubt regarding the color code for ground cables according
> EN60204-1 (for CE mark):
>
> In the norm is stated that all protective earth wires MUST be yellow
green.
I don't think EN60204-1 contains this requirement. I have IEC60204-1:1997.
It requires "GREEN-AND-YELLOW" for insulated conductors.
Shape, location, or marking are acceptable methods for identifying a non
insulated PE conductor.
> What color must be cables that are connected to ground because they need
> to be referenced to ground, but are NOT protective earth wires? (ex:
> secondary of a transformer,...that´s what I think is called functional
equipotential
> conections )
The norm calls these "operational bonding". Refer to clause 8.
> According to the norm seems that they still need to be yellow-green, but
No. Only a protective conductor should be GREEN-AND-YELLOW (i.e. required
for protection against electric shock).
See clause 14.
> one guy from TUV told me that these wires MUST NOT be yellow-green (they
> could be any different color except yellow-green).
This is not correct :
when you use color (only) to identify a conductor -
yellow or green cannot be used in combination with another color
light blue cannot be used when light blue is used to identify the
neutral conductor in the circuit
when a green wire or a yellow wire could possibly be confused with a
"GREEN-AND-YELLOW" wire.
If you use BLACK, RED, BLUE, or ORANGE - make sure you read
subclause14.2.4.
Finally, make sure that your wires are identified as indicated in your
documentation.
Regards,
Matt
>
> I appreciate your comments, and advises of were to find this information.
> Thanks.
>
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