2.—
Earthing
Product selection guide
An effective earthing system fundamental requirement any modern structure or
system for operational and/or safety reasons.
Earthing systems typically fall into (but are not
limited to) one the following categories:
• Power generation, transmission and distribution
• Lightning protection
• Control undesirable static electricity
• Telecommunications
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Conductors and earth
electrodes
As with lightning protection, the first choice
faced the designer earthing system the
type conductor used. They have high
mechanical strength, excellent corrosion
resistance and conductivity. Inspection pits allow
easy access earth electrodes and conductors
to facilitate this procedure. Mechanical clamps
Where permanent connections are not
appropriate, mechanical clamps offer the ideal
solution. Below ground, copper the
most common choice due its high resistance
to corrosion.
6. Earth rods
Earth rods take advantage lower resistivity
soils greater depths than normal excavation
will allow. These are typically used smaller scale
installations where periodic disconnection for
testing required. Without such system, the safety a
structure, the equipment contained within and its occupants are compromised. Conductors
We offer three types conductor:
• Flat tape
• Solid circular
• Stranded cable
It important that earthing conductors should be
correctly sized for their application, they may
be required carry considerable current for
several seconds.
They can also provide protection potentially
dangerous places, e. Compression connectors
For applications where exothermic welding not
appropriate for creating permanent connections,
compression connectors may used. range conductor materials
is available.
1. Earth plates
Earth plates are used attain effective earth
in shallow soils with underlying rocks in
locations with large amounts buried services. offer range of
connectors and termination methods suit
a wide range applications:
4.
Compression connectors produce very robust joints
which can buried the ground concrete. Above ground, copper, aluminium
and steel may used.
5.
70 FURSE® EARTHING LIGHTNING PROTECTION
QUALIT SOLUTIONS FOR SAFEGUARDING PEOPLE, STRUCTURES AND SERVICES
.
In addition the conductors, earth rods and
plates any combination thereof can be
used achieve effective earth depending on
the site conditions.
3.
All Furse mechanical clamps are manufactured
from high copper content alloy. The correct choice
of conductor extremely important, whether
it simple below ground electrode a
complex computer room signal reference grid.
Poorly chosen badly installed joints and
connectors can compromise the safe operation
of earthing system.
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Connectors and
terminations
An effective earthing system relies joints
and connections have good electrical
conductivity with high mechanical strength.g. Earth inspection pits
Regular inspection and testing the earthing
system essential. switching positions
