Planning empty conduits for satellite system and photovoltaic system

Just a naive question: Is the planning of the empty conduits for the work plan with the main contractor now decisive, or can I still spontaneously say during the shell construction: Electrician, can you install one or two empty conduits here for me? After all, it has not yet been clarified in the work plan where and how a satellite system will be installed. So, in short: What can I still arrange later, possibly directly with the craftsmen on site, or what do I already have to include now in the work planning, because it will no longer be possible afterward? According to the statements so far, the costs seem really exaggerated, I will also inquire about that again.

Clearly yes and no!

I just read that 450€ are due per pipe, so 900€ for two.

One has to wonder if they are made of gold.

The material value is well below 100€.

Well, the question is what is included in the price. If you also count the mast, the grounding, the roof tile, and the labor... then it already adds up to a few euros... okay not 900 but certainly 300-500...

Regarding planning: I don't know your contract and the flexibility of the general contractor/tradesman, but technically, you can of course also have empty conduits installed at a later date - provided there is enough space in the shaft.

We are currently building (the shell is finished) and as I have learned, I will do the electrical installation myself. For some things (including empty conduits), I will basically decide spontaneously while laying the cables what else will go where.

Pay attention to the distances. The grounding cable must not be routed directly next to the other cables. The longer the cable, the further away from the others. Ask an electrician.

But it’s not that simple. According to the standard, it looks like this: You must run a rigid Cu 16 mm² cable from the antenna to the grounding system preferably outside on the building. See page 12 in the following document (or section 11.3.2 of DIN EN 60728-11 / VDE 0855-1).

The deep earth electrode must be connected to the building’s grounding system.

Additionally, the antenna mast must be connected to the grounding busbar via a potential equalization conductor, for which you could use the 16 mm².