Sleeving on switch live

[Jupiter01]

Most of my lights are looped at the ceiling. My switched live cable at the ceiling and switch is a blue wire with a brown sleeve for identification purposes. I think this is the correct convention?

I do have a couple of lights that are looped at the switch and have this configuration:

@flameport these images are absolutely awesome and I use them all the time. Thanks!

Is the wire in L1 still know as the switched live? And does it require any sleeving for identification purposes?

Thanks in advance.

 

[EFLImpudence]

Is the wire in L1 still know as the switched live?

Does it become live when the switch is switched on?

 

[333rocky333]

The sleeving is only used to denote its a Live cable rather than its function, therefore if its Brown cable it needs no sleeving.
However it is worth marking to assist terminating the switch now or in the future but not no reg to say you need to indicate its purpose as a Switchline.
A switchline is basically the term used for the wire from an output of a switch to the fittings lamp termination or similar load.

 

[Jupiter01]

However it is worth marking to assist terminating the switch now or in the future

Is there a defined method for this?

 

[333rocky333]

Is there a defined method for this?

No not really, some mark with tape but can get sticky and messy, personally if i am replacing a broken switch i tend to just put one to whatever dots on the switchlines with a black permanent marker, however with just two browns or two reds, your marking convention will only be of use to you as you knew what you marked and without testing you can not take for granted what one of the pair is actually the switchline, not that it usually matters.
The same goes for Blue cores at switches, you can not always assume they will be the Switchline as opposed to the live.

Marking, in this case is more use when there is multiple switch lines really.
As you know the Regs mainly cover marking cables when the colour is not used for its intended purpose and the most common occurence is the Blue in lighting circuits being designated for a different purpose other than Neutral