Knob and tube wiring is the original electrical wiring system and is still in use in some homes today. In the 1880’s, knob and tube wiring became very popular. It was inexpensive compared to conduit & other electrical options during that era. Knob and tube wiring systems consisted of ceramic knobs and tubes, and the electrical conductors which were wrapped with a woven flexible insulating loom sleeve for added protection. Although inexpensive, knob and tube wiring was very labor intensive, but over time the labor costs for the electricians themselves exceeded the cost of materials.
Knob and tube wiring held the electrical load of the home well until after the World War II era when more electrical appliances and devices became available. The increase in electrical appliances being installed in homes caused more of an electrical load demand than the knob and tube wiring systems could handle. The increased load also caused increased heating temperatures which created the threat of fires in homes. Over time the insulation of the wiring systems electrical conductors became dry and brittle, and in other cases were easily damaged by rodents and/or renovations which made it an increased hazard having this type of wiring system in your home.
If your home was built in the 1930’s or earlier, you may have a knob and tube wiring system installed, and we strongly recommend having a professional electrician evaluate the system and/or replace it. Replacing the electrical wiring would be the best option to ensure your home – and family – is safe for many years to come and up to code.
For more information on knob and tube wiring systems, click on the link or call us today and speak with one of our professional electricians for help with your knob and tube wiring system concerns.
We look forward to speaking with you about your knob & tube project! Give us a call or fill out our contact sheet today.