One Way Lighting Circuit

[Bane]

Hello people.

Well, for my homework, I've been asked to research one way lighting circuits.

On google I've come across a number of sites and not many on wikipedia.

Anyway, seeing as how we haven't even covered lighting circuits at college yet I found this a bit poo. I digress, sorry.

Can someone please explain to me a one way lighting circuit in relatively simple terms?

Cheers.

 

[ian.settle1]

Bane,

A one way light circuit is basically one switch to switch the light on.

A two way is where the are switches at different locations switching the light on.

You can also fit intermediate switch on the strppers so you can switch light on at three or more location depending how many intermediate switches are fitted.

Hope this helps you out.

May not get much info about switches on wikipedia as you will find it an American website.

 

[Bane]

Ah. Ok.

Very simple and the answer was quite easy too!

Thanks Ian.

 

[spark-doctor]

Have a look at this

 

[Bane]

Not understanding that diagram Spark-Doctor.

Phase=Live?
CPC= Earth?

Red sleeving indicates that the neutral becomes a live also?
If yes, then why red sleeving and not brown?

Explain please.

 

[spark-doctor]

And to get you ahead of the others



Sorry mate. It is a old picture. Look at this one ond all will be clear.

 

[Bane]

Ok, got that thanks mate.

One thing. What's going on in the top right corner of the diagrams, where they are circled?

Explain please.

Sorry, but I like to know all the ins and outs, I can't just accept things.

 

[GAZHUDDS]

The circle bit represents the light fitting

 

[spark-doctor]

The circle is showing the ceiling rose with the termination points.

Just to add. These pictures are showing the wiring in T&E. If you were to wire it in singles through conduit you would be able to run the correct color wiring and would not need the sleeving. The wiring diagram would be the same though.

 

[Bane]

So where are the cables going from the fitting to the left of the page?

 

[GAZHUDDS]

There coming from the consumer unit or another ceiling rose in the circuit.

 

[spark-doctor]

To the consumer unit/fuse.

 

[Bane]

Cheers Gaz, cheers Ian, cheers Ian (Spark).



I'll be extra clever and throw in the 2 way too!

 

[heathelect]

There either going to or from the next light or from the consumer unit. Hope that helps, dave

 

[Bane]

Thanks Dave

 

[spark-doctor]

If you wanted to add another lamp to the circuit, just run another piece of T&E from the ceiling rose to another lamp. Connect the new neutral to the existing neutral. The new phase to the switched phase (the one with the sleeving and the new CPC to the existing CPC This is called the "loop in method"

 

[Bane]

Loop in method. Ok.

And the cable used is T&E 2.5mm? 1.5mm?

Phase is Live?
CPC is Earth?

Getting to grips with terminology too.

 

[ian.settle1]

Loop in method. Ok.

And the cable used is T&E 2.5mm? 1.5mm?

Phase is Live?
CPC is Earth?

Getting to grips with terminology too.

1.5mm for lighting
2.mm for sockets

 

[spark-doctor]

Loop in method. OK.

And the cable used is T&E 2.5mm? 1.5mm?

Phase is Live?
CPC is Earth?

Getting to grips with terminology too.

Generally lighting circuits are in 1.0mm T&E, socket circuits are in 2.5 T&E.

Try to get out of the habit of calling the Phase live and the CPC earth especially the later. They have different meanings as you will find out in the next few weeks

 

[Bane]

Thanks guys.

So in T&E you have:

Neutral
Phase
CPC = Circuit Protective Conductor (Earth sleeving?)

Correct?

Finally, in the diagram we'll have 1.5 going into the light fitting from the CU and 2.5 coming down to the switch?