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October 23, 2026
House wiring is hidden inside walls, so it is easy to forget about it for decades. Meanwhile the way we use electricity has changed completely. A house wired 25 years ago for a few fans, tube lights and a fridge may now be running three ACs, a geyser, a microwave, a washing machine and a UPS. Old wiring was never designed for that.
This guide lists 8 clear signs that your house wiring needs replacing, explains what a rewiring job involves and how to plan it so the new wiring lasts for decades.
PVC insulation slowly hardens with heat and age, especially in hot roof slabs and walls facing the sun. After 20 to 25 years, insulation often becomes brittle and cracks when touched. Age alone is a reason for a thorough check.
A smell of hot plastic, or switch plates and sockets that feel warm, means heat is building up somewhere. It may be a loose joint or a wire that is too thin for its load.
Brown or black marks around sockets, melted plug pins or discoloured switch plates are signs of overheating connections.
Frequent tripping, especially when the AC, iron or kettle starts, usually means circuits are overloaded or the wiring is too small for today’s appliances.
Lights that dim when a heavy appliance starts point to voltage drop from undersized or poorly connected wiring, particularly on the main line.
Some older houses were wired partly with aluminium or with low-quality wire. Aluminium joints loosen over time and are a fire risk inside homes. See copper vs aluminium wire.
If sockets have no earth connection, or there is no earth wire running through the house, the installation is missing a basic safety layer. Read why your house needs earthing.
Adding ACs, an electric oven, a geyser or a new floor is the right moment to upgrade. Each heavy appliance needs its own line, and the main line may need to be bigger. Renovation is also the cheapest time to rewire, because walls and ceilings are already open.
| Situation | Usual approach |
|---|---|
| Wiring is fairly new, one circuit has a problem | Repair or replace that circuit |
| Adding 1 or 2 ACs | Add new dedicated AC lines, check the main line |
| Wiring is 25+ years old with brittle insulation | Full rewiring |
| Aluminium or no earth wire | Full rewiring with copper and earth |
| Major renovation | Full rewiring while walls are open |
A qualified electrician should inspect the wiring, test insulation and tell you which option is right.
Often, yes. If the old conduits are in good condition and not crushed or blocked, an electrician can pull out old wires and pull new ones through, which saves breaking walls. If conduits are damaged, too small or missing, some chasing of walls may be needed.
Thrive Cables supplies the full range for a rewiring job, from 1 mm² for lights to 7/64 for main lines, plus solid earthing wire. Every coil is 99.9% pure copper with fire-retardant PVC insulation, made in Lahore, in 7 colours. Order at factory price on WhatsApp at +92 324 6570645.
How long does house wiring last?
Good quality copper wiring that is correctly sized and installed can last 25 years or more. Heat, overload and poor quality wire shorten its life.
How long does rewiring a house take?
It depends on the size of the house and whether conduits can be reused. A small house may take a few days; a larger house longer.
Is it safe to live in the house during rewiring?
Often yes, if the electrician rewires one section at a time. Discuss the plan with them first.
If your wiring is more than 20 to 25 years old, smells hot, trips often or has no earth, it is time for a proper check and probably a rewire. Plan for today’s appliances and tomorrow’s, use pure copper wire of the right size for each circuit, add earthing and an RCCB, and have a qualified electrician do the work.
Tell us the size and quantity. We reply on WhatsApp the same day.
