This is the simplest and most effective approach, as the OP doesn’t have to rely on anyone else to understand the situation. By carrying out the check himself, he can draw a clear and confident conclusion about what’s really happening. Just to add this, make visual observation to make sure you get the correct size of breaker installed by PLN in your installation. In your case of 3,500W power contract you should get 16A breaker installed. If lower than this, this is probably the main cause your main breaker keep tripping. In this case you need to ask PLN to install the right size breaker. e.g what you have paid for. This is their responsibility.
Personally, I find it very unlikely that anyone sensible is stealing electricity from the OP, and here’s my thought:
- The OP’s electricity contract with PLN allows for only 3,500 watts, a relatively small amount, not worth the trouble of stealing.
- If someone were stealing power from the OP (rather than directly from PLN), the total load current would still be detected by the main breaker. For example, if the neigbour took half, the OP would only be able to use around 1,750 watts before the main breaker tripped.
- If the neighbor truly intended to steal electricity from the OP’s house, the connection would have to be made before the OP moved in to make it unnoticed, since the connection must be established after the main breaker inside the OP house.
- And if the thief has any sense, he’d target the power company (PLN) instead, since that would allow access to a much larger amount of electricity
- Typically, people who steal electricity do so on an industrial scale to make it worthwhile. For examples factories, small manufacturing businesses, home industries, etc. The typical case of electricity stealing in other countries in residential area is the illegal cannabis home growers for cannabis grown inside an ordinary residence which require a large amount of electricity for lighting and mechanical ventilation
In the real world everything could happen even with low probability, but a definitive answer, need to be found. I encourage the op to try the method in post #27 and please let us know the outcome so we could all learn from this case.