your opinions ?

I don't see what the issue is?

 

Not a problem, not even a sticker required these days.

 

Unless you are going to be simultaneously in contact with the phase conductor of both circuits (when you shouldn't be in contact with either) then you won't be exposed to 400V.

 

I have had problems in the past using audio equipment where the signals are from sources on different phases.

 

I too was under the impression installing sockets in close proximity on separate phases was bad practice. Saying that never seen a reg to back it up in all honesty either.

 

The most stupid one I ever saw was in a training centre for electricians of all places,attached to the bottom of a 3 phase DB was a single socket, coming out of this was a 20mm bush and coupler and on the other end of this was another single socket.I removed the front from the top socket and it was fed with a red,black and a green/yellow,the black and the G/Y looped down into the lower socket,passing through the top socket box was a single yellow,this went from a fuse on the yellow phase to the bottom socket.The red feeding the top socket went to another fuse on the red phase,this was around 25 years ago and the warning label was nowhere to be seen.Apparently it was done by one of the instructors when they needed an extra socket,they didn't have any twin metalclads in the stores,so he did the best he could with the materials available!

 

It has never been permissible to wire final circuits in phase colours anyway.

 

It wasn't so much the colour of the wires that bothered me,more what he'd done with them,I dread to think what his pupils turned out like.

 

I realise what the objection was - I was just pointing out that the colours were also unacceptable.

 

I know,lol,

 

That is just so not true.

 

It is absolutely true.

Only DISTRIBUTION circuits (or submains as they were called then) were allowed to be wired in phase colours.

 

To start with, I suggest you try to find a current Regulation which prohibits the use of Phase colours for final circuits.
Then you should consider whether brown is a phase colour.
Finally, you should consider what colours you would use to wire a 3 Phase socket.
Then come back and state again that wiring final circuits in phase colours is not allowed.

The simple truth is: the wiring of single phase colours in any colour other than brown has been prohibited since 2004 16th edition Amd 2.

 

Unlike a single phase final circuit there is an L1, L2 and L3 there. So a pretty poor point on your part which just makes you look ridiculous. BS 7671 CLEARLY states that the line conductor of a single phase circuit shall be brown (or marked "L").

It has been a long time since the Wiring Regulations permitted single phase distribution circuits to be identified by phase colours, and they have never permitted single phase final circuits to be so identified.

Even before the 2nd Amendment to BS 7671:2001 introduced harmonised colours these prohibitions existed with the pre-harmonised colours. You could not wire a final circuit in yellow and black or blue and black. (Incidentally, if a circuit was wired in blue and black it would be extremely confusing now as to which was the phase conductor and which was the neutral conductor without careful investigation.)

 

@Risteard - To be fair to @spinlondon you did not originally say single phase circuits. You said "final circuits". Three phase final circuits can be wired in phase colours.

Also you say that single phase final circuits must be "brown or marked 'L'". So if wired in phase colours a simple 'L' marker at termination would make wiring in phase colours in a single phase final circuit permissible. No?

 

Any colour conductor, other than an unsheathed G/Y can be used for line, phase, neutral or earth, as long as it is correctly identified at terminations.
The means of identification can be either by colour or alphanumerical.
An unsheathed G/Y conductor can only be used for earth.

 

There is nothing wrong with admitting that you were wrong @Risteard