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Joined: Feb 2004
Posts: 9
E
Junior Member
I´m looking for a international standard that define electrical color codes to be used in low voltage power distribution cables in a three phase system.

I´m interesested in particular in verify if there standards that defines the colors of grounding cables.

Joined: Jul 2002
Posts: 8,423
Likes: 3
Member
Well,
Emilio, I think that you may have just found the right place for this!. [Linked Image]
We had a whole host of posts here a wee while back on this very subject.
Hey, and must say that you are the first to post from Brazil there mate, but we are all in the same boat here, just trying to learn more.
I'll just go and have a look for you!. [Linked Image]

Joined: Feb 2004
Posts: 9
E
Junior Member
thanks.

The standard of wire grounding color has become a polemic issue in my company last week.

Im happy to find a helping hand.

Joined: Jul 2002
Posts: 8,423
Likes: 3
Member
OK Emilio,
Just click on the link below:
https://www.electrical-contractor.net/ubb/Forum15/HTML/000077.html
Scott35, another of our Moderators, has done a really cool job of presenting it all!.
Hope that this helps. [Linked Image]
And please, feel free to peruse and reply to the other topics in the Board here, you're more than welcome to, you know!. [Linked Image]

Joined: Feb 2004
Posts: 9
E
Junior Member
thanks a lot.
Ill be try to share with our mates.
thanks again.

Joined: Jul 2002
Posts: 8,423
Likes: 3
Member
Hey Emilio,
What Voltage do you guys use?

Joined: Feb 2004
Posts: 9
E
Junior Member
In my plant we usually are using
13,8kV 3Ph
4,16kV 3Ph
0,46kV 3Ph
220/110 1Ph (grounding and neutral coming from the center of the secondary of the distribution transformer.

For while, I'm worried about the 0,46kV system but it's important to remember the rest of the electrical distribution system.

Joined: Aug 2001
Posts: 7,520
P
Member
Hello Emilio, and welcome to ECN.

It's quite intriguing the way that different color code standards developed over the years. Those of us who grew up in English-speaking countries always associate green with grounding conductors, and the thought anyone could have used anything else seems very strange (we've just about got used to green with yellow stripes now [Linked Image]).

Click here to see the discussion which led to the posting in the reference area.

Joined: Feb 2004
Posts: 1
D
Junior Member
Hi new to this forum but i have a question about regulations for DC colour coding in the UK.

My understanding is that the norm is to use Red /Black is this correct ?

Darren Butts

Joined: Jul 2002
Posts: 8,423
Likes: 3
Member
Darren,
Welcome to ECN, mate!. [Linked Image]
The answer to this question depends upon where you are installing the DC equipment.
With Panel boards, this can mean anything apart from Red and Black, where the 240V wires use this coding.
We have codings here of Violet, Orange or Grey. [Linked Image]

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