Knob and tube wiring (K&T) was an early method of wiring in buildings commonly used in North America from about 1880 to the 1940s. This system is considered obsolete and can be a safety hazard.
Facts About Knob-and-Tube Wiring
- Most of the dangers from this system arise from it’s age, amateur modifications and situations where insulation is in contact with or covers the wires.
- This system does not have ground wires and therefore can not safely accommodate three prong plugs.
- It is not permitted in new construction.
Problems Associated with Knob-and-Tube Wiring
- Unsafe modification is very common with this type of wiring when compared to newer wiring because the K&T wiring is so old that more opportunities existed for improper modifications.
- The insulations that encases the wiring can be a fire hazard.
- It may stretch and sag as it ages.
- It does not have a ground conductor. Grounding conductors reduce the chance of electrical fires.
- In very old systems the wire may be insulated with varnish and fiber materials that are susceptible to deterioration.
K&T wiring needs to dissipate heat and therefore any insulation that comes into contact with or covers the wiring may create a potential fire hazard.
Contact us today at www.energygeeksinc.com or give us a call at 401-766-1540. You will be glad you did.