Is SAT grounding possible via a 7x2.5mm² cable?

  • Erstellt am 2022-02-25 22:33:07

*Dipol*

2022-06-21 23:10:04
  • #1

16 mm² Cu in solid and multi-strand form is standard-compliant, but the antenna grounding is only functional with connectors certified at Class H = 100 kA including the HES.


Grounding conductors from roof antennas as well as photovoltaic cables or functional grounding conductors for the photovoltaic module carriers according to recommendation of Annex 5 of DIN EN 62305-3 are lightning highways in rare direct strikes. If they pass through the building interior, dangerous proximities are inevitable regardless of how the cables and conductors are divided into two adjacent empty conduits.


The only one who "accepts" anything is the client; contractors have a right to have a defect-free work accepted. Since no lightning protection system but only a conventional grounding is being installed, only the grounding system must be measured for continuity resistance between the connection lugs before concreting according to DIN 18014:2014-03 by a licensed electrician and documented with plans and detailed photos. If this has been properly performed, YOU have to accept the grounding system; it is rarely norm-compliant.

Without a lightning protection system, no measurement of earth resistivity is currently required.


According to DIN 18014: 2014-03, ring earth electrodes are only required in cases of elevated earth resistivity such as waterproof concrete (WU concrete). From a standard-compliant documentation of an electrician, it must be evident whether all connection lugs are connected with the ring earth electrode AND with the functional equipotential bonding conductor laid in reinforced concrete slabs similar to a foundation earth electrode. The lightning current carrying capacity of the connectors must also be documented.

If a standard-compliant measurement documentation from a licensed electrician exists: please upload it, then I will review it and provide an assessment.
 

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