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.
History of knob and tube wiring. Knob and tube wiring was the go-to method for electricians in the United States from the 1880s to the late 1930s. Many pros continued to use this method through the 1950s, '60s and even '70s for new home construction.