Ernie, you are opening a huge can of worms here and it is not probably not appropriate for this thread. Are there any official standards for the residential market? Even if we list some (e.g TIA570B and the labelling standard TIA606B) do you think they are followed even in the huge resi $1m+ projects? The resi market is very young and unorganized in terms of official guidelines and so it is very difficult to distinguish between official standards, common practices and company practices.