in 2004 I was asked to install lighting and power in and on a large steel framed open sided farm building....usually I would have used plastic tube and singles but on this occasion opted to use multi core armoured as it would be quicker to install than tube...the job dragged on ,then was delayed for lambing and during this period the harmonisation of colour codes came into effect..this was a nightmare when it came to connection time as I now had brown, blue, black, white etc plus red, black, blue and yellow...all of which had to be allocated to various roles.....so allocating blue to a live role is not unusual.
As long as the conductor is properly marked, in this case with red tape...[/QUOTE
Yes I sleeved all wires with the appropriate colours, and wired it into an isolator instead of a JB with the appropriate label, I also sleeved all the wires at the shed end. I would have replaced it. but the concrete garage floor had been screeded over it. What makes it worrying is that none of the installation was protected with an RCD and the customer said he was thinking of adding some more sockets in his shed. Himself,,,, about 12 months ago.