Emergency lighting for a beginner

[Pete999]

I think OP wants a 2 way circuit with 3 lights, plus an emergency light Ona key switch from the same circuit.

Moggy, we can’t do your homework for you... post a diagram of what you think it should be and we will tell you if you’re on the right lines.

Not drawn very well I know

View attachment 46752

Not drawn very well I know

View attachment 46752

MyWay - https://int.search.myway.com/search/video.jhtml?enc=0&n=78497c7c&p2=%5EBZC%5Exdm161%5ETTAB02%5Egb&pg=video&pn=1&ptb=D20FAD4F-0F28-43A1-83A5-F41AE8DF20A2&qs=&searchfor=Key+Operated+Switches+and+Emergency+Lighting+YouTube&si=&ss=sub&st=tab&tpr=sbt&trs=wtt
This may help the OP, at least I hope it does.

 

[Strima]

The operation of the key switch should not affect the operation of normal lighting.

 

[Richard Burns]

If you were to replace the greyed out section of your wiring with the added section, try and follow how the wiring would work for both the emergency light when the key switch is operated and for when the light switch is operated.
This version uses only one pole of the double pole key switch to avoid the possibility of having a light supplied by a line conductor but having no neutral conductor, not a recommended practice.

 

[bhamoggy]

So could anyone please do a sketch so I can see where I’ve gone wrong please

 

[Richard Burns]

I thought I had really, I am still unsure what switches and result you actually want to achieve but if this is easier to follow:

 

[Flanders]

Just to note you can use one of the terminals in the double pole switch to terminate both neutrals cables in , there are also 2 way switches with a neutral terminal on them . I think hager make them

 

[bhamoggy]

I thought I had really, I am still unsure what switches and result you actually want to achieve but if this is easier to follow:
View attachment 46756

Thanks
I take it that’s a link from the common to L1 on the switch next to the key switch?

 

[Richard Burns]

Sorry I did get the two way wiring wrong where it joins your diagram, crossing over the conductors.
Alternative version using a terminal of the DP switch for a connector only, as per Flanders post:

 

[westward10]

You say you are an apprentice have you considered joining the Trainee section.
APPLYING FOR TRAINEE FORUM ACCESS - https://www.electriciansforums.co.uk/threads/applying-for-trainee-forum-access.123576/

 

[Loki]

This is what I came up with

 

[bhamoggy]

You say you are an apprentice have you considered joining the Trainee section.
APPLYING FOR TRAINEE FORUM ACCESS - https://www.electriciansforums.co.uk/threads/applying-for-trainee-forum-access.123576/

I guess I am, I have 2330 level 2 & level 3.
2391 and 17th but didn’t get a lot of work so went back to engineering but now taken a job in maintenance but wasn’t sure about emergency lighting so giving an example of this lighting issue as I have a problem with it on the stairs at work. Just need to understand how it’s wired correctly

 

[bhamoggy]

Thanks for the drawings Richard burns and Loki
Really appreciate your help and everyone else

 

[bhamoggy]

The key switch is on a grid plate with a rocker switch.
And the other switch is at the bottom of the stairs for the 2-way but I guess the wiring is the same?

 

[Richard Burns]

This is what I came up with

Electrically fine and would work as expected.
However the testing of the emergency lights should not affect the normal lighting (Strima's post #17) and in your diagram the normal lighting would be switched off when you are testing, this is very useful to the tester for checking EM lights as they will be the only ones on, but would cause major inconvenience in a large enclosed office block relying on the lighting.