I'm located in France.
For a house (built over 30 years ago) I have to pull new cables through the garden (about 20 m - 30 m). The cable has to avoid certain trees, bushes, obstacles and arrive at a certain point.
Earth is rather hard (clay) and I considered renting a tiny soil trencher.
There are existing electricity cables in conduits, telephone cables in a conduit and water pipes (non metal).
Electricity counter is at the border of the garden. Water counter a few hundred meters away near the public street. The house is accessible via a private street with right of use).
The conduits are over 30 years old and broken and destroyed. The service trying to add a fiber connection to the house tried to use the existing phone line conduit, just to find out, that the probe wire (don't know the correct term) went in 5 meters and came then out in the the garden. So it seems the conduit is no more in a decent state.
I don't have any confidence that the previous owner respected the 'officially' required depths and that he used marker tapes, which should normally be placed a few centimeters above the actual cables / pipes to avoid digging in to them by accident.
I know where each one arrives at the house (so I know the starting point), but I do not know where exactly they are going.
Is there any equipment (to buy / to rent), or are there any specialists who can help locating the existing wires / pipes?
Are metal detectors good enough for thin electricity cables / phone wires? How can I detect water pipes without metal?
Are there other tricks and recommendations of how to avoid breaking the existing 'connections'?