ᐅ Is it possible to ground a satellite system using a 7x2.5 mm² cable?
Created on: 25 Feb 2022 22:33
V
Vwgolfcabrio
At my grandmother’s house, we installed a satellite dish on the roof. It is not grounded. Installing a new cable would be very difficult. However, there is an unused 7x2.5mm2 power cable available. I could probably use this for grounding and connect it to the masts and the grounding busbar, right? It may not comply with the standards, but it should be better than nothing.
bauenmk2020 schrieb:
For grounding, I am planning a 16mm² (25.6 AWG) grounding conductor between the mast and the house equipotential bonding bar, and for the equipotential bonding between the mast, grounding block with surge protection, multiswitch, and house equipotential bonding bar, a 4mm² (11.4 AWG) grounding conductor. 16 mm² copper conductor, both solid and stranded, complies with standards, but the antenna grounding is only functional and compliant when connected with connectors certified at least to class H = 100 kA, including the HES.
bauenmk2020 schrieb:
I currently have two empty conduits running from the attic to the utility room. Can I put all cables (grounding plus 4 coaxial cables) in one conduit? A photovoltaic system is planned eventually. That will certainly require grounding as well. How should I separate the individual cables? All grounding cables in one conduit and the rest in the other? Grounding conductors for roof antennas, as well as photovoltaic wiring or functional grounding conductors for PV module supports, according to the recommendation of annex 5 in DIN EN 62305-3, represent potential lightning current paths during rare direct strikes. When these are routed inside the building, dangerous proximities are inevitable, no matter how the cables are distributed between two adjacent conduits.
bauenmk2020 schrieb:
For my safety, I want the lightning protection system to be inspected and approved. The only party who approves or accepts work is the client; the contractor has the right to have the completed, defect-free work accepted. Since only a conventional grounding system is installed, not a full lightning protection system, the grounding installation must be tested and documented before concreting according to DIN 18014:2014-03 by a licensed electrical professional. This includes measuring the continuity resistance between connection terminals and providing plans and detailed photos. If executed accordingly, YOU must accept the grounding system; it is rarely installed in full compliance with standards.
Without a lightning protection system, measuring soil resistivity is not currently required.
bauenmk2020 schrieb:
We installed a ring earth electrode in the ground and connected it to the reinforced concrete slab (reinforcement steel). In the utility room, the grounding conductor rises up, and the house equipotential bonding bar was installed there. Additionally, I have a conductor rising at a corner of the house. This is probably also connected to the ring earth electrode. I believe the shell contractor installed this because it was specified in our scope of work. Would this be suitable as grounding for a lightning rod or rather not? According to DIN 18014: 2014-03, ring earth electrodes are only required when soil resistivity is high, for example with waterproof concrete (WU concrete). A compliant documentation from a qualified electrical expert must show whether all connection terminals are connected both to the ring earth electrode and to the equipotential bonding conductor embedded in the reinforced concrete slab, which functions similarly to a foundation earth electrode. The lightning current carrying capacity of the connectors must also be documented.
If a compliant measurement documentation from a licensed electrical professional exists, please upload it so I can review and assess it.
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