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When wires were wrapped around the knobs, they provided support for the wiring and kept it a few inches away from the wood in the walls or framing of the house.
The conductors are supported along their length by porcelain knobs nailed or screwed to the wooden structural components of a building.
Many pros continued to use this method through the 1950s, '60s and even '70s for new home construction.
Now, many homeowners looking to upgrade their electrical system or complete a renovation are discovering "hidden" knob and tube wiring in their homes and wondering how to proceed.
That level of risk increases greatly if the system contains even a small amount of K&T wiring.
We can reduce, but not eliminate risk associated with a K&T system if it is minimized and modified by a licensed professional electrician that is familiar with this very old wiring method.