:> :As you know I am working on wiring a detached garage/shop. I am a
:> :newbie. I have attached a link to my work thus far. I am having a
:> :little trouble figuring out how to route everything. Any helpful
:> :advice is appreciated.
:> By the photo's it appears you are not going to install a ceiling so the
:> running across the rafters at right angles as in photo 80 are a definite
:> Even if you had a ceiling you shouldn't do this. Mains power cabling must be
:> attached and run along a beam or joist in a construction such as yours so
:> is protected as much as possible. Just imagine carrying a metal ladder in
:> garage and snagging it on those cables and pulling them down. A disaster
:> to happen.
:I am eventually probably going to install 7/16 osb for a ceiling. But
:I understnd what you are saying. If I run 2x4's between rafters to
:support those wires is this acceptable?
:Also, If I dont put walls up, is it ok to use those plastic outlet
:boxes I am using or is that a no-no?
As Tom Horne suggests, a smaller support timber is adequate. While the height of
the unsupported wiring may be higher than the minimum stated in the rules, as
long as it is accessible by someone carrying a metal ladder (or similar), or it
can be accidentally snagged, then it is inadvisable to leave it unprotected. Who
knows how long it will be before the ceiling goes up? And if it never does and
you sell the place then somebody else might wear the result.
As long as those plastic wall boxes are fixed and fully enclose the outlet there
is no problem without the wall board fitted.