Externally, the jollity of aged men has much in common with the mirth of children; the intellect, any more than a deep sense of humour, has little to do with the matter; it is, with both, a gleam that plays upon the surface, and imparts a sunny and cheery aspect alike to the green branch and grey, mouldering trunk.
1) Knob and tube wiring is two-stranded â with a hot wire and a neutral wire only â it uses no ground wire. There is absolutely no protection whatsoever when a fault occurs.
Problems with knob and tube wiring. If a knob and tube system is intact and working, it poses no immediate risk to you and your family. Problems often arise, however, because of the age of the installation or modifications made to the electrical system by a previous owner or unscrupulous electrician.