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

[rewireIT]

The wiring isn't done like that for the (common) loop in at lamp method. In fact, the student diagram is from wiring that was done a very long time ago.......

You mean GSH's diagrams or the one from the book?

 

[Loki]

lightwiring.co.uk has good diagrams like this one

 

[davesparks]

The wiring isn't done like that for the (common) loop in at lamp method. In fact, the student diagram is from wiring that was done a very long time ago.......

It does state that it is the conventional wiring method as commonly used in commercial and industrial installations.

A lot of commercial and industrial installations are done in conduit and singles so will be wired using conventional 2 ways rather than switch conversions.

I last wired a 2 way like that yesterday, I wouldn't call that a very long time ago.