I originally saved every page of the website with spaces in the page titles. When I uploaded the pages the spaces changed to %20. This made some links stop working so I changed all of my 184 pages a few days ago and forgot to change the post on here!
I like the graphics on both, as they are simple to understand.
Recently when i was doing something with wiring, i found a site that used illistrations a bit like yours, but also took real photos of what was happening.
i.e. for your light switch one it would of been a real wall, with the channeling still dug out so you can see everything. The real pictures really helped as it gave a better idea of what it should look like