Quick answer
SANS 10142 recommends testing every six months using the test button on the earth leakage unit itself. Press it; the unit must trip immediately. If it does not, it is not protecting anyone and needs replacing straight away. This is the single most valuable thirty-second safety check in the house, and almost nobody does it.
What you can do now
- 1Press the test button on the earth leakage unit — it must trip immediately
- 2Do the test every six months, and pair it with something memorable like the clock change
- 3Warn the household first, since everything on that section goes off
- 4Reset it afterwards and confirm power is restored throughout
- 5Save anything open on computers before testing
When to call a professional
A failed test means replacement within the week — an earth leakage that does not trip when tested is providing no protection at all, and you have no way of knowing it without pressing the button. If it trips but will not reset, there is a fault on the installation, which needs an electrician rather than repeated attempts to reset it.
Typical cost in Johannesburg
Earth leakage R1,800–R2,800 fitted
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.