Since electrical work is not for amateurs, many homeowners do not know a lot about the electrical components in their homes. Considering all the wiring hidden behind the walls, it can be that everything you know is everything you learned on your pre-sale review — if you recall, that’s.
If it comes to electrical infrastructure, one feature that puts homes apart is the kind of wiring from the walls. And for many decades’ worth of elderly homes, that kind is conservative knob and tube wireing.
What’s Knob and Tube?
Knob and tube wiring dates all of the way back into the 1880s, however, it was still in widespread usage as recently as the 1950s. For the majority of its heyday, it was the cheapest choice for wiring a new home, both in terms of installation and price of materials. However, by the 50s, mass production of modern electrical cables offered a cheaper, safer choice.
This sort of wiring is made up of 2 wires — a hot wire and a neutral cable — strung inside walls and above ceilings with ceramic knobs and tubes. The tubes supplied a secure place to run cables through studs and joists, and the knobs encouraged that the cables and made it simple to wrap them around corners.
The cables are protected with sheaths. From the early days, these were made of treated fabric, but electricians eventually switched to rubber. Neither material was designed to survive forever.