Can I use old cloth-covered electrical cable in my home if it still has power?
Quick answer
Old cloth-covered cable can still carry power but should not be considered safe just because it works. This type of wiring, common in UK homes built before the 1960s, has insulation that degrades with age and becomes brittle, cracked, or conductive. Even if your lights and sockets appear to function normally, the risk of electric shock, fire, and failure to disconnect under fault conditions is significant. You should have a registered electrician carry out an Electrical Installation Condition Report immediately to assess the true risk before deciding on any rewire.
🏠Homeowner view
Just because electricity is flowing through old cloth-covered wiring does not mean it is safe. Many homeowners inherit this type of wiring in older properties and assume that because everything still works, there is no problem. Unfortunately that assumption can be dangerous and here is why.
Cloth-covered cable, often called vulcanised rubber insulated or lead-sheathed cable, was installed in UK homes roughly between the 1920s and the early 1960s. The rubber insulation inside the cloth braid degrades over decades. It becomes hard, brittle, and starts to crack. When insulation cracks, live conductors can become exposed or can arc against earthed metalwork, which is a common cause of house fires.
One of the most serious concerns is that much of this old wiring was installed without a proper earth conductor. Circuits without earth protection cannot work correctly with modern RCD protection, and metal appliances in your home would not be safely protected in a fault situation. This puts you at real risk of a fatal electric shock.
What you can check safely without touching any wiring:
Look at your consumer unit. If it contains old rewirable fuses rather than modern circuit breakers and RCDs, this is a strong sign the wiring has never been updated.
Look at any exposed wiring in the loft, under floorboards if accessible, or behind older sockets and switches. If you see black, brown, or red fabric-covered cables, this is very likely original wiring.
Check whether sockets are round-pin or have no earth pin, as both suggest outdated installations.
You should not attempt to investigate further yourself. Do not pull at old cables, unscrew accessories, or use a plug-in socket tester as the only means of assessment. These steps will not reveal the condition of insulation inside walls and ceilings.
What you should do is call a registered electrician, ideally one registered with NICEIC, NAPIT, or ELECSA, and ask for an Electrical Installation Condition Report. This is a formal inspection that will grade any defects and tell you whether your home needs a partial or full rewire. Many insurance companies and mortgage lenders now require evidence of satisfactory wiring before they will provide cover or complete a sale, so having this report also protects you financially.