Old Colours/new colours

[Phil59]

Hi All
This is my first post! Been following the forum with interest on and off over the last year.
My query is I have been to see a Office / Warehouse unit that has had a lot of cables cut out by travellers, the cables in the trunking at roof level are fine from 1st floor level to all the Low Bay lights but from 1st floor level back to distribution board have all been cut out (also all office sockets circuits in skirting trunking is intact other than from where it enters the warehouse from where its been cut out). I have quite a lot of old stock Red/Black so am i correct that i can use these old colours jointed (crimped) in adaptable boxes clamped to the side of the trunking with bushes for the supplies back to the DB as the cables will be all the same colour or do i need to sleeve them Brown & Blue? or use new colours only Instead crimped to the existing Black/Red wiring?
Any advice will be appreciated.
Phil

 

[Phil]

hope this helps

 

[Phil59]

Thanks for that Phil7677 i already have a copy of that info, its just that i cant see how it will comply with 17th Ed if only the 1st 25% of the length of cable is Harmonised with the remainder old colours?!
I have read elsewhere in the forum that its ok to use Old Colours if they are identified correctly at the DB but i cant find any info on this situation in which repairs are carried out with old colours?

 

[mogga]

IMO whaat your talking about isnt much different from say Moving a DB or wiring an extension to the lighting circuits so long as the instalation is Labled as containing two wiring syatems and as a wee extra put a notice in the db as to where jbs are located

 

[Risteard]

Thanks for that Phil7677 i already have a copy of that info, its just that i cant see how it will comply with 17th Ed if only the 1st 25% of the length of cable is Harmonised with the remainder old colours?!
I have read elsewhere in the forum that its ok to use Old Colours if they are identified correctly at the DB but i cant find any info on this situation in which repairs are carried out with old colours?

They're only preharmonised colours if they haven't been reidentified in harmonised colours (which they must be). So it's really a non-issue.

Just sleeve them.