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Topic Title: Wiring colours
Topic Summary: Prefab units from overseas
Created On: 20 September 2017 12:28 PM
Status: Read Only
Linear : Threading : Single : Branch
 Wiring colours   - jammyc - 20 September 2017 12:28 PM  
 Wiring colours   - mapj1 - 20 September 2017 01:20 PM  
 Wiring colours   - jammyc - 20 September 2017 02:04 PM  
 Wiring colours   - CMK3PD - 20 September 2017 01:25 PM  
 Wiring colours   - AJJewsbury - 20 September 2017 02:56 PM  
 Wiring colours   - kellyselectric - 20 September 2017 05:40 PM  
 Wiring colours   - davezawadi - 20 September 2017 08:09 PM  
 Wiring colours   - AJJewsbury - 21 September 2017 09:59 AM  
 Wiring colours   - broadgage - 21 September 2017 10:41 AM  
 Wiring colours   - jammyc - 21 September 2017 02:10 PM  
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 20 September 2017 12:28 PM
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Posts: 41
Joined: 25 November 2009

Hi all,

We're subcontracting on a site providing the main LV distribution to prefab industrial buildings by a Spanish contractor.

The first batch arrived yesterday and we had a quick nosey to spot any obvious problems; amongst other snags it turns out the wiring appears to be grey-brown-black-blue for L1-2-3-N respectively. I believe, but may be wrong, that that's because their implementation of CENELEC isn't the same as ours.

Obviously option A is to install as per conventional colouring, inform the main contractor of the discrepancy and agree for someone to erect signs to alert maintenance crews about the nonstandard colouring, as you might when interfacing with old school RYB.

However, our LV AC work is fairly limited to the main panel, submains and a few security systems, while the units on shipment are 90% wired in so given that nothing of ours has yet been terminated might it actually be safer in the long run for our cabling to conform to the above rotated arrangement rather than have a change in colour systems at the interface? Maybe with alphanumeric tags at each end for comfort. Would need to be clearly signed one way or the other, but for O&M teams I'd have thought consistent site rules of "It's all squiffy" would be less likely to cause confusion, espescially when circuits get added/modified/repaired come year 10.

We have no direct control over the unit contractor (and it's not our sign-off save to ensure it's safe to energise, and that's the nuclear option) so I suspect getting them to rewire isn't going to happen.



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