Electrical fault diagnostics in Belgrade
Intermittent tripping, failing insulation, a fault that only shows up sometimes — measured with instruments instead of guessed at.
From 2.000 RSD · deducted from the repair price if the work is done in the same visit
An intermittent fault is the most expensive kind, because it usually gets "fixed" by swapping parts until something happens to work.
When measurement is the only way
- The RCD trips, but not always — usually the water heater or a machine, but it can be moisture in outdoor wiring.
- A breaker trips more and more often — insulation on one circuit failing gradually.
- Appliances keep dying in the same spot in the flat.
- A shock from a tap, a sink or an appliance body.
- Something smells of hot plastic and you cannot see where from.
- There has recently been work done and something has not been right since.
How it goes
Conversation first: when it happens, what is switched on at that moment, whether it tracks the weather or a particular appliance. This narrows things down before a single instrument comes out.
Then measurement, circuit by circuit — insulation, leakage current, loop impedance, protective conductor continuity. With the values written down, not "it looks like this one".
If the fault is inside a wall, we split the circuit in half and measure again, then again — until the section is down to a few metres. That is slow but reliable, and far cheaper than chasing walls blind.
What you get
Numbers, not an opinion. A report with the measured values, an explanation of each, and a proposal with a price before we start anything.
If the repair happens straight away, the diagnostic fee comes off the price of the work.
One sentence that saves an hour
Before you call, write down exactly when the fault appears and what is switched on at the time. That one sentence often saves an hour of measuring.
Common questions
The fault only shows up sometimes. Is it worth calling?
It is, and this is exactly where measurement earns its keep. An intermittent fault is invisible to the eye, but insulation resistance and leakage current can be measured even when the fault is not currently active. Note down when it happens — that is half the diagnosis.
What exactly do you measure?
Insulation resistance per circuit, earth fault loop impedance, leakage current per circuit, continuity of the protective conductor, and earth electrode resistance. All with a calibrated instrument, with the numbers written down.
How long does it take?
For a flat, usually one visit of one to two hours. If the fault is inside a wall and the exact location is needed it can take longer — then we halve the circuit repeatedly until the section is narrowed down.
What do I end up with?
A report with the measured values, an explanation of what they mean, and a proposal with a price. If the repair is done in that same visit, the diagnostic fee comes off.
Where we do this
Read before you call
Why does the RCD keep tripping?
Five real reasons your residual current device trips, and how to figure out which one without ripping out a single wire.
Five signs your installation is genuinely dangerous
The handful of warning signs that mean you should stop, kill the main breaker, and pick up the phone.