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Old 10-22-2015, 01:11 PM   #1
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Default Neutral - Blue, or LIGHT blue

As I search through the internet, I find some sites that say the EU wiring uses light blue for neutral, but other sites just say blue. Which is it? How critical is this?

I kinda need to know because I am having NO luck finding a distributor that carries 6awg light blue UL-MTW wire.
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Old 10-22-2015, 01:20 PM   #2
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in eu power cord it is often regular blue
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Old 10-22-2015, 01:21 PM   #3
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Originally Posted by Feyd313 View Post
As I search through the internet, I find some sites that say the EU wiring uses light blue for neutral, but other sites just say blue. Which is it? How critical is this?

I kinda need to know because I am having NO luck finding a distributor that carries 6awg light blue UL-MTW wire.
We cannot use blue light or otherwise as a neutral, are you working in the UK?

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Old 10-22-2015, 01:29 PM   #4
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We cannot use blue light or otherwise as a neutral, are you working in the UK?

Welcome to the forum
No we can't but often I get listed fixtures that have a blue neutral. Some equipment also comes with blue wiring for the neutral. We cannot use blue in out field wiring but we can connect to it in listed products
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Old 10-22-2015, 01:54 PM   #5
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This is for wiring of equipment that the customer wants to be wired "globally". This is why it has to meet UL-508 standard, AND has to be CE certified.
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Old 10-22-2015, 02:01 PM   #6
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Here's a reference I came across:

http://www.openelectrical.org/wiki/i...le_Colour_Code
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Old 10-22-2015, 03:42 PM   #7
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That's cool, in Switzerland line 3 is white..
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Old 10-22-2015, 03:55 PM   #8
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Default Just got a machine in from Germany

We just got a new machine in from Germany and this is what they used.
Machine is feed with 380/230v 3 phase with 120v single ulitily rectp.

Blue - DC hot
Blue/wh stripe - DC minus
Black - line voltage
Red - 120 volt hot
Light blue - Neutral for 230volt
White - neutral for 120 volt
Orange - interconnecting machine wires
Yellow - Hot wires not disconnected by main switch ( panel AC and lights)
Green/yel stripe - ground
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Old 10-23-2015, 08:45 AM   #9
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Its dated, Black is no longer used as a neutral in the UK, same for blue being used as as a phase.
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Old 10-23-2015, 08:49 AM   #10
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Here is the current colot code requirement for most countries based on IEC 60446:
Attached Thumbnails
Neutral - Blue, or LIGHT blue-color-1.jpg  

Neutral - Blue, or LIGHT blue-color-2.jpg  

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Old 10-23-2015, 08:52 AM   #11
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Originally Posted by Black Dog View Post
That's cool, in Switzerland line 3 is white..

Neutral used to be black in the UK
Attached Thumbnails
Neutral - Blue, or LIGHT blue-3phasecolours.jpg  

Neutral - Blue, or LIGHT blue-2009121801e.jpg  

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Old 10-23-2015, 09:36 PM   #12
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Originally Posted by just the cowboy View Post
We just got a new machine in from Germany and this is what they used.
Machine is feed with 380/230v 3 phase with 120v single ulitily rectp.

Blue - DC hot
Blue/wh stripe - DC minus
Black - line voltage
Red - 120 volt hot
Light blue - Neutral for 230volt
White - neutral for 120 volt
Orange - interconnecting machine wires
Yellow - Hot wires not disconnected by main switch ( panel AC and lights)
Green/yel stripe - ground
Looks like they have wired for the north american market. That color code is very similar to what we use a lot for automotive manufacturing lines, except we use white (or white with black or red strip) for all the neutrals.
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Old 11-11-2015, 10:28 PM   #13
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Light blue often denotes DC neutral. Not that many panel manufactures seem to take any notice.

Bring back Red, White, Blue and Black. White was replaced in the late 70’s with Yellow, just in time to confuse a young wet behind the ears apprentice starting out in the trade.

The new harmonised colours are a disaster in the making. In low light……… I’ll let you decide.
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Old 11-20-2015, 07:53 PM   #14
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Light blue often denotes DC neutral. Not that many panel manufactures seem to take any notice.

Bring back Red, White, Blue and Black. White was replaced in the late 70ís with Yellow, just in time to confuse a young wet behind the ears apprentice starting out in the trade.

The new harmonised colours are a disaster in the making. In low lightÖÖÖ Iíll let you decide.


Did this color scheme come out of Geneva Switzerland? Im all for the old colors.
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Old 11-20-2015, 08:13 PM   #15
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Did this color scheme come out of Geneva Switzerland? Im all for the old colors.
I'm afraid you missed it: the committee decided to make EVERYONE unhappy.

That levelled the playing field.

That's how collective decisions get made.
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Old 11-21-2015, 12:44 AM   #16
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Did this color scheme come out of Geneva Switzerland? Im all for the old colors.
Brussels!

Belgium canít even get their voltage inline with the rest of Europe.
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Old 11-21-2015, 01:49 AM   #17
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Brussels!

Belgium canít even get their voltage inline with the rest of Europe.

What was so special about that color code?
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