• type earthing systems, there minimum re-
quirement two earth rods. Depending the soil
conditions, earth rods can driven into the earth by
hand using suitable electric, petrol pneumatic
hammers. This
should routed distance 1.4.
• Down-conductors are interconnected near the sur-
face the ground.5 below the
surface the earth under the frost limit.
Information arrangement type earthers
• general, earth rods are inserted vertically into the
earth fairly large depths.
• Earther arrangement, type connection inside and
outside the building structure.
A type earthing system suitable for low building
structures (e.3.
• Often, the specific ground resistance cannot de-
termined the densely built-up areas. They are driven into nat-
ural soil, which usually only found beneath found-
ations.
As minimum dimension (according IEC 62305-3),
a length 2.g. 0. these
cases, when determining the minimum length the
earther, sufficient assume specific ground
resistance 1,000 Ohm/m.
All earth rods must connected with ring earther
inside outside the building and with entry to
the equipotential busbar. single-occupancy dwellings), existing
building structures, for LPS with air-termination rods or
tension cables, for isolated LPS.
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Chapter The external lightning protection system
.1 Type earth rod structure
Functional method
As single earth electrodes, earth rod 9.5 for vertical routing and for hori-
zontal routing apply for type earthers for lightning
protection classes III and IV.0 in
length recommended for each conductor.2. Type earthing
systems comprise horizontal and vertical earth elec-
trodes, connected each conductor.
Earth rod, type A
Underground connection
Main earthing rail (MER)
Earthing system, type Connection outside the building
structure
The type fan earth rods not fulfil the require-
ments for equipotential bonding and potential control.0 from the
foundation the building and min.
The required earther lengths may
be split into several lengths con-
nected parallel
