ᐅ Planning Conduits for Satellite System and Photovoltaic System

In our construction project, the architect has no problem with making separate agreements directly and at your own expense with an electrician.

Is there any contractual clause that forbids you from entering the construction site?
Usually, the general contractor (GC) has the right of control over the site, yes. The GC can ask you to leave. But as long as there is no official ban on entering the site, and no formal order to leave, you can also easily install two conduits after working hours.
This may sound quite extreme, and it would indeed be extreme if the GC banned you because of your own work. It is common for homeowners to do some work on their own construction site.
At this point, please note the obligation to register any helpers with the relevant workers’ compensation insurance or authority.

You mentioned a service duct and only two empty conduits.
Just get the appropriate conduits (e.g., "Fränkische" pipes), install them yourself, secure them with clamps or cable ties, and that’s it. This will likely take about 30 minutes of work and cost around 30€.

If it concerns more than just the empty conduits—as the previous commenters have pointed out—you should definitely talk with an electrician beforehand or immediately about what exactly needs to be done.
Also, ask the GC what is included in the €900 service and critically consider how installing only two plastic conduits in an existing duct could cost so much more.

Alternatively: Who is handling the photovoltaic system? They could include laying the conduit. Request a price for that.
Or contact the electrician directly. If these are reputable companies, they will definitely be willing to find a solution.

jaeger schrieb:
It’s not quite that simple

Exactly. That’s why you should ask an electrician.
The note referred to the positions of the empty conduits in relation to each other.

The lightning protection/grounding cable must run via the most direct and shortest route from the antenna mast/wall bracket to the main grounding busbar (MGB) of the house and must not be installed alongside other cables.

The coaxial cables also need to be grounded. However, this is mostly unrelated to the topic “planning empty conduits for satellite and photovoltaic systems.”

Since I happened to come across the old topic through a cross-reference, I decided to comment on some remarks regarding desecration.

AOLNCM schrieb:
Coaxial cables must also be grounded. However, this has little to do with the topic "planning empty conduits for antenna systems and photovoltaic systems."

Correct, but the discussion drifted into antenna grounding and equipotential bonding, containing outdated standards as well as incorrect statements.

• The temporary decoupling of antenna safety from lightning protection standards in the two relevant regulations, with the prohibition of stranded grounding conductors, was a mistake. This was already reversed for transmitting/receiving antennas with DIN VDE 0800-300: 2002-07, but for receiving antennas it was inexplicably only reversed much later with DIN EN 60728-11 (VDE 0855-1): 2010-11.
• At the time of this thread, stranded grounding conductors had been permitted again for 6.5 years.
• Since abandoning that mistake, connectors for individual grounding conductors must be certified according to test standard Class H = 100 kA, regardless of whether the conductor is solid or stranded, made of 16 mm² (0.025 in²) copper, 25 mm² (0.039 in²) aluminum, or 50 mm² (0.078 in²) steel. Because grounding conductors that could theoretically conduct rare, exceptional lightning currents > 200 kA require connectors with tested lightning current carrying capacity of the highest test class H = 100 kA for their intended function.
• Although lightning currents on typically only one grounding conductor of antennas are at least as dangerous as on a minimum of two down conductors of lightning protection systems, compliance with separation distances calculated according to IEC 62305-3 is only normatively required for lightning protection systems and related metallic building parts.
• The external down conductor and the deep earth rod shown in all previous example illustrations of old and current standards for conventional direct grounding, despite the additional foundation earth electrode, are both optional.
• If an additional auxiliary earth electrode is installed, it must generally be connected with other earth electrodes and the equipotential bonding system.

CONCLUSION:

• Complying with normative separation distances and avoiding dangerous proximity is sensible for both antenna grounding and potentially lightning-current-stressed photovoltaic system strings and functional grounding conductors of support structures, but without a lightning protection system (LPS) it is not required by standards.
• When passive protection (e.g., St. Florian principle) fails, lightning currents from objectively rare direct strikes use all available paths to earth and are not limited to grounding and equipotential bonding conductors but also affect coaxial cables and strings.
• Installing only antenna grounding conductors outside while routing photovoltaic cables and functional grounding conductors inside as lightning current highways without separation distances is pointless from a lightning protection perspective.
• Those who want to best prevent partial lightning current coupling into antenna and photovoltaic systems must not ground directly but need to minimize strikes on sensitive roof installations according to the state of the art with separate air termination systems.
• Adequately insulating separation distances are usually not possible with internal routing, and unspecified distances between the two empty conduits discussed here provide no safety benefit.
• The VDE publication series #6 from 2005, which still promoted direct grounding to LPS and arbitrarily recommended separation distances of 0.30 m (1 ft) in air and 0.60 m (2 ft) through solid materials, as well as a general protection angle of 45°, have long been outdated in terms of lightning protection.