Is this Intermediate switching image from the Student's Guide wrong?

[rewireIT]

Shouldn't the lines from the first switch both go into the L1 L2 on the intermediate switch?

 

[James]

Looks correct to me.
but feel free to draw out your solution for comparison

 

[rewireIT]

Looks correct to me.
but feel free to draw out your solution for comparison

Ok so on that note, the reason i'm asking is because the GSH electrical channel has a video on this, and he says the L1 L2 from the first switch cannot go L1 L3 and must go L1 L2 on the intermediate switch.

Is he wrong or is that just another way of doing it?

 

[timhoward]

What GSH was probably meaning is that you need to connect to the left hand side of the the switches as marked in fig 8.14
If you connect to the top two terminals as marked in fig 8.14 then things won't work as intended.

In real life it's never not been the top two grouped and the bottom two grouped as far as I can remember.

 

[nicebutdim]

Guide does appear to be poorly illustrated. If wired as per 2nd image the circuit would only ever close with intermediate in one position.

I'm not sure if all intermediate switches are marked L1-L4 but, as @timhoward states, the general convention is that they're intended to receive one set of strappers in the top and the other in the bottom.

 

[davesparks]

Ok so on that note, the reason i'm asking is because the GSH electrical channel has a video on this, and he says the L1 L2 from the first switch cannot go L1 L3 and must go L1 L2 on the intermediate switch.

Is he wrong or is that just another way of doing it?

Different manufacturers label switches in different ways so they are both right for a particular brand and style of labelling.

The diagram in the book is correct for the way the switch is shown as operating in the picture above it.
The GSH video is correct for the majority of common switch manufacturers, but not all.

The key thing is to learn how the circuit works and how to read the manufacturers instructions/diagrams.

Anyone can match wires to numbers, an electrician needs to understand what they are doing.

 

[davesparks]

I'm not sure if all intermediate switches are marked L1-L4

I've seen them with two pairs of L1 and L2 and with A1, A2, B1, B2

 

[timhoward]

Guide does appear to be poorly illustrated.

AH I see the issue now. Yes. I was looking at the whole circuit which is ok.

The picture top right in fig 8.14 is not consistent with the diagrams showing how the switches work. At least that is my experience.
Ignore the picture of the real switch.

 

[nicebutdim]

I've seen them with two pairs of L1 and L2 and with A1, A2, B1, B2

I wasn't going to make any bold statements were labelling of intermediate switches was concerned as it's not something I've studied in great detail - that and the fact that switches seem to be labelled as and how each manufacturer sees fit.

Thinking about this some more, I think L1, L2, L1, L2 is probably what I've seen most often. After this thread I'm going to find myself studying ever single intermediate switch that crosses my path

 

[rewireIT]

I'm still rather confused as to what you're all saying - so is it the picture of the 'real' switch that is wrong physically, or is it labelled wrong?

The real switch picture and the diagram are laid out the same, so which part is wrong?