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Total Solution to Earthing & Lightning Protection |
9AKK106354A3360
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Earthing
Product selection guide
Earthing
An effective earthing system is a fundamental requirement
of any modern structure or system for operational and/or
safety reasons. Without such a system, the safety of
a structure, the equipment contained within it and its
occupants are compromised.
Earthing systems typically fall into (but are not limited to) one
of the following categories:
–– Power generation, transmission and distribution
–– Lightning protection
–– Control of undesirable static electricity
–– Telecommunications
The following schematic illustrates the key elements of an
effective earthing system.
Conductors and earth electrodes
As with lightning protection, the first choice faced by the
designer of an earthing system is the type of conductor to be
used. The correct choice of conductor is extremely important,
whether it be a simple below ground electrode or a complex
computer room signal reference grid.
1. Conductors
We offer three types of conductor:
– Flat tape
– Solid circular
– Stranded cable
It is important that earthing conductors should be correctly
sized for their application, as they may be required to carry a
considerable current for several seconds. A range of conductor
materials is available. Above ground, copper, aluminium and
steel may be used. Below ground, copper is the most common
choice due to its high resistance to corrosion.
In addition to the conductors, earth rods and plates or any
combination thereof can be used to achieve an effective earth
depending on the site conditions.
2. Earth rods
Earth rods take advantage of lower
resistivity soils at greater depths than
normal excavation will allow.
3. Earth plates
Earth plates are used to attain an effective
earth in shallow soils with underlying rocks
or in locations with large amounts of
buried services. They can also provide
protection at potentially dangerous places
e.g. HV switching positions.
Product selection guide - Earthing
No.
Type
Section
/ Page No.
1.
Conductors
3/1
2.
Earth rods
7/4
3.
Earth plates
7/10
4.
FurseWELD exothermic welding
9/2
5.
Compression connectors
8/23
6.
Mechanical clamps
8/2
7.
Earth inspection pits
7/9
8.
Earth bars
8/18
9.
Earth electrode backfills
7/11
Main aspects and individual components of an earthing system
1
4
5
8
1
8
2
5
1
2
3
4