8/24/2023 0 Comments Romex wire![]() Disregarding any inherent inadequacies, existing KT cable systems are likely to be unsafe because they are almost guaranteed to be at least 50 years old.Some insurance companies refuse to write fire insurance for houses with this type of wiring, although this may be remedied if an electrician can verify that the system is safe. ![]() UF rated wire can be run without conduit, but only under certain conditions. According to the National Electric Code, regular Romex wire must be housed in conduit if run outdoors. Knob-and-tube wiring is more vulnerable to damage than modern wiring because it is insulated with fiber materials and varnish, which can become brittle. No, you cannot run Romex underground without conduit.The homeowner or an electrician should carefully remove any insulation that is found surrounding KT wires. A possible exception is fiberglass insulation, which is fire-resistant, although even this type of insulation should not cover knob-and-tube wiring. The dissipated heat from knob-and-tube wiring can pose a fire hazard if the wires are enveloped in building insulation. ![]() The following are a few reasons why inspectors should be wary of this old wiring system: Whenever an inspector encounters knob-and-tube wiring, s/he should identify it as a defect and recommend that a qualified electrician evaluate the system. Knob-and-tube wiring is supported with ceramic knobs, and runs intermittently though ceramic tubes beneath framing and at locations where the wires intersect. They are more difficult to improve than modern wiring systems and are a fire hazard. Romex is the trade name for a type of electrical conductor with non-metallic sheathing that is commonly used as residential branch wiring. Most houses constructed prior to World War II were wired using the knob-and-tube method, a system that is now obsolete.
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