How to answer a question?

Why take a chance with electricity? It is lethal if neglected. You seem to know this already. So, i would put the cable where there is no risk of water falling on it. Put the cable above the water pipe, or if possible, 20 feet away from it.

is there anything about this in cahier technique..Schnieder documents??

You must think of the worst case, in both ways. Not only what if the pipe leaks, but also what if the cable insulation fails? If the pipe leaks and the cable insulation is rated for wet environments, there may not be an immediate danger but prolonged exposure may end up causing problems. But if, let's say 40 years from now, the insulaltion starts to "leak" in terms of it's dielectric (resistance to the electricity going to ground / earth) potential, the pipe (assuming metallic) will become energized, and theoretically all the water in it if all the circumstances are right (wrong?). In other words the potential danger there is much greater than the potential the other way. I would not do it.

Here in the US the common practice is to have minimum 12 inches of separation between pipes (water / gas / steam etc.) and direct burial or tray cables. I'm not sure if it is actually a Code requirement, it's just what I see on most construction specifications.

I totally agree with you for safety aspect and I suggested the cable (a temporary cable line to serve for the container area for 5 months) should be installed on the separated pole line.

After checked, there are rare cases for the 100mm pipe to get leaked. The cable is 4-core PVC/PVC. If you are so sensitive, why we are using all the cable tray inside the factory with cables even if they may just have one PVC insulation only?

Doesnt matter....just keep distance of 300mm (it is the rule followed) between the water pipe and cable. Very very rare chance to get damage in water pipe and cable at same place and same period.

What is the probability of; Quote "If these 02 things happen at the same time at the same place?

While 100 lights on a Christmas tree would require less than 500 watts LED's even less, why would someone select three phase source i.e. "(4 cores, PVC, PVC)"

Don't You have the options to further enclose the electric cable in pvc pipe / conduit or to select 12 volts power supply or to use an earth leakage circuit breaker at the circuit.

You need to appropriately phrase the question before you expect an answer to that question!

Mountk2:

This is not that I am providing power for Christmas tree. I have one project where the Vendor need 60Amp/380V power supply.

So, we will run the cable beneath the fire water piping along the wall. Someone come out and say it is not allowed because it is not safe. I dont know how to explain to him the correct answer and if I can, I need to reconsider the installation method.

Here, we have many heads that may come up with brilliant idea and explanation that we ourselves may utilize for the future situation.