Grounding SAT system

  • Erstellt am 2016-10-11 21:21:25

tecker2010

2016-10-11 21:21:25
  • #1
Hi,

my question actually fits very well with the thread "Installation einer SAT-Anlage"

I would like to install our SAT system on the roof of our city villa myself. The laying of the coaxial cables throughout the house is included in the contract and will be laid to the attic for me. There I would like to install a 5/8 multiswitch and wire it accordingly with the LNB.

The biggest hurdle for me is probably the topic of grounding / equipotential bonding. You probably don't want and shouldn't completely do without it.
What would you recommend? Basically, do the grounding outside, lead it on the facade and into the ground with a suitable grounding rod (I would probably leave that to a professional)? Or is it sufficient to connect the SAT system to the equipotential bonding bar in the utility room? How would you implement the equipotential bonding?

wrote in the other post:



In this case, the cable will probably be laid inside along the wall in corresponding (specially milled) channels, right? Laying it together with other cables contradicts the purpose of grounding. I would also have an electrician do the grounding later, but it should probably be implemented/prepared as far as possible during the construction phase.

One more picture of how it currently looks on our roof:


Thanks in advance.
 

Dipol

2016-11-14 19:57:48
  • #2
I’ll give my two cents, albeit a bit late.

Those questions have already been addressed.

In the German standards committee DKE K/735, it was decided in 2014 that classical lightning rods should be banned. Even though this has not yet been incorporated into any valid edition of the standards, I would never route antenna grounding conductors with dangerous proximities inside.

This makes it easier for lightning to jump over. In the VDE publication series #6 it says: This must be warned against.

This should also be observed for buildings with photovoltaic and solar thermal systems, which by standards only need to be protected when buildings have a lightning protection system. A direct strike will usually affect all roof structures, which can only be reliably protected by separate air termination rods. For white or black tanks, a mesh width of ring conductors with maximum 10 x 10 meters is then required.

A good planner would have provided a separate connection lug for the antenna grounding on the foundation/ring earth while it was still easily and cost-effectively possible. All grounding electrodes must be connected to each other and the equipotential bonding (HES) in a lightning current-carrying manner, see ABB information sheet #10 (currently not accessible due to new homepage) or DEHN lightning planner chapter 5.5.6 Meshing of grounding systems. A separate earth electrode would be proof of incompetence even in stainless steel (NIRO) execution.

16 mm² copper wire withstands lightning current strengths up to 200 kA, provided suitable clamps are used. Connection components on the antenna support and the HES itself must be tested according to the test standard for the wire type used class H = 100 kA.

Does this grounding system exceptionally comply with DIN 18014:2014-03 or was it also installed contrary to standards and without measurement and photo documentation by the shell builders?
 

Similar topics
18.10.2013SAT and/or cable?12
25.05.2015Extractor hood / roof or wall14
24.05.2015KfW 55 with wooden house - U-values: Wall 0.18 - Roof 0.1617
05.05.2016Insulate the roof: flakes, panels or wool17
11.08.2016SAT dish, rafter holder in self-made work10
05.04.2017LAN / SAT wiring in single-family house52
20.10.2017Roof with photovoltaic or other investment, any experiences?19
25.03.2019Ceiling suddenly too small for controlled residential ventilation!54
17.11.2019Satellite system - buying guide and installation41
02.12.2019Single-family house (2 floors + residential basement + developed attic) approximately 200 sqm - changes162
07.12.2019Bank guarantee from the roofer due to defects in the roof16
27.02.2020Is the vapor barrier in the roof vapor-permeable? Yes? No!16
10.04.2020Rainwater from the roof - drainage in the soil for discharge?12
16.01.2023Full rafter insulation roof or insulation on concrete slab40
26.01.2021Reasonably changing existing SAT/cable connection botch work27
27.10.2021Photovoltaic system 120 sqm living area - cover the entire roof?45
24.09.2022Neighbor grounding and drainage on our property41
14.06.2023Neighbor is building a garden house, the roof extends beyond the property boundary21
29.11.2023Bought a modern house. Roof not well insulated?12
02.07.2024Development according to §34 - Large house with steep roof required11

Oben