Wildcat, your taking this rather personal which is, frankly, immature.
We are not being difficult or contrite for the shear hell of it, but if you actually read your ORIGINAL post you will, perhaps, then understand the reaction you got.
Maybe you should have explained that you are a CEng, and that you have rewired houses before but you were simply stuck on this one bit of info.
Would you rather we gave you information that made you think you could do a job you perhaps cannot, then killed yourself or someone in your family?
There is a fine line between giving out advice and giving out TOO much advice, as an Engineer you should understand that, regardless of your field.