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.
There are a number of concerns with knob and tube wiring. Some of them are listed hereâ¦. 1  It is an ungrounded system, which provides a greater chance of shock or electrocution and damage to sensitive equipment. 2  It is very old wiring (at least 62 years old, at best), and in many cases has deteriorated, cracked or is missing insulation, which can lead to fires.