I never use "J" boxes if at all possible to omit them. There is no reason for them in this plan. 4-way switches are used when there are more than 2 switching locations, but the first and last switch in such a run are 3-way switches. The number of conductors between 4-way switches is three, not 4 as shown, but then the switching sequence is not really indicated. Maybe this wiring is required. I would not have quite so many switches as shown, and I would place them differently. It is customary to indicate with lower case letters (a,b,c) which light fixtures are associated with which switches.
Re: can someone help me out with this blue print#44209 10/31/0408:19 AM10/31/0408:19 AM
I'd like to second electures motion on doing your own homework, talk with your teacher.
I also agree that from a practical standpoint, it's simpler to tie all the lights together with a pair of wires run either to one of the switches (typically one of the two 3-way switches, not the 4-way switches) or a junction box. However, your teacher may be looking for a little more imagination.
If you haven't seen it yet, look at some wiring diagrams of 3-way switching, then compare to 4-way switching. It's really just adding the 4-way (or two or three 4-ways) into the two travellers of the 3-ways.
Stick with it, it's the best trade around.
Re: can someone help me out with this blue print#44210 10/31/0412:28 PM10/31/0412:28 PM