Identification of Conductors

[hightower]

Just got my head in the bible at the minute, and looking at 514.3.2:

"Every core of a cable shall be identifiable at its terminations and preferably throughout its length..."

Is this not technically an infringement when using twin brown for switch wire?

 

[Octopus]

Just got my head in the bible at the minute, and looking at 514.3.2:

"Every core of a cable shall be identifiable at its terminations and preferably throughout its length..."

Is this not technically an infringement when using twin brown for switch wire?

Every core -obviously written with use of singles in mind.

As for twin brown they are both live so not a problem IMHO

 

[hightower]

Actually, it would be identifiable in that it's marked brown for live. Sorry, answered my own question here, I was originally reading it that each core should be individually identifiable (ie which is the feed in and which is the return.)

 

[hightower]

Is it acceptable to run 2 circuits to the same 2g switch. One scenario I'm thinking of is a hall switch that gang 1 powers hall light and gang 2 powers landing light, gang 1 being on separate circuit to gang 2. If it is permissible, is it best practice to do this, or would it be better (let's say if rewiring a house) to have the landing on the same circuit as the hall light?

 

[HandySparks]

Close.

Brown is used for line, blue for neutral. Both are live.

 

[Richard Burns]

Yes it is acceptable and very common in office lighting to have more than one circuit at a switch plate.
It is generally not very common in domestic part from the example you mentioned, but it can happen with outside lighting and garden lighting as well.

 

[telectrix]

acceptable as long as both L and N for the landing light are both fed from 1 circuit.

 

[hightower]

Thanks lads

 

[Paul.M]

Always nice to leave a message in the back box that the hallway/landing lights are on two different circuits and may also be on different RCD's.

 

[hightower]

How would you do this Paul?

 

[Paul.M]

How would you do this Paul?

Hand held label printer or just use a marker pen (for when the batteries run out on the printer like last week DOH).

It helps out the next man by telling them that "up lights = RCD1 C3, Down lights RCD2 C7".

 

[hightower]

Thanks that makes sense. Seems like there's something else to invest in eventually haha

 

[conrad]

Im currently wiring 8 new build houses and there is 3 seperate circuits within one 4 gang switch as per spec... Is a strange spec throughout tbh.

 

[Andy78]

Always nice to leave a message in the back box that the hallway/landing lights are on two different circuits and may also be on different RCD's.

Writing BANG! on the backbox should suffice to remind anyone going in there of safe isolation.

 

[Risteard]

Just got my head in the bible at the minute, and looking at 514.3.2:

"Every core of a cable shall be identifiable at its terminations and preferably throughout its length..."

Is this not technically an infringement when using twin brown for switch wire?

No, it's more compliant - i.e. it meets the preferable criteria in addition to the essential criteria.

Here everyone uses twin brown for T&E switch drops. No-one would dream of using brown & blue sleeved, even though it is technically permissible.

And on the other side of the border using brown & blue sleeved is actually prohibited.

 

[hightower]

Thanks all, I couldn't find a regulation restricting it so, but didn't know whether that was just down to my BS7671 search skills.