Quick answer
The signs of overloaded wiring are consistent: warm sockets, scorched or discoloured plug tops, breakers tripping under ordinary use, lights dimming when a heater runs, and multi-plug adaptors daisy-chained together. Warmth is the one to take seriously. A socket that is warm to the touch is dissipating energy it should not be, and that only ever gets worse.
Common causes
- Undersized cable for the load now connected to the circuit
- Multi-plug daisy chains concentrating several appliances on one socket
- High-draw appliances sharing a circuit, such as a geyser and a heater
- Circuits designed decades ago for a fraction of today's appliance load
- Extension leads used permanently instead of adding proper sockets
- Loose terminations creating resistance and heat at the connection
What you can do now
- 1Feel sockets and plug tops on heavily used circuits — any warmth is a warning
- 2Eliminate daisy-chained adaptors entirely
- 3Spread high-draw appliances across different circuits rather than one convenient socket
- 4Look for scorching or discolouration around socket pins
- 5Stop using any socket that is warm or discoloured until it has been checked
When to call a professional
Book a load survey before adding solar, an EV charger, or any significant renovation load — that is when marginal wiring becomes an actual problem. Call sooner if any socket is warm or discoloured. An electrician will measure the load on each circuit, check terminations and cable sizing, and recommend where circuits need splitting or upgrading.
Typical cost in Johannesburg
Survey R950
Indicative ranges only. We provide written, itemised quotes before any work.
Related services
Need a Plumber or Electrician Today?
Owner-managed by Garth Blair. We pick up the phone and book you in personally.