Figure
29
: If an upper termination lug coupling is
not available, a (TERMLUGCOUPL) may be used
in conjunction with a coupling tube (part: Ericore/
UTSP) as shown here
Series Splicing
As an alternative to running twin Ericore
cables, a single Ericore cable can be run, but
it is separated into several sections, none of
which exceeds the cable breakdown voltage.
This is done by periodically connecting the
cable to a conductive structural point.
The lower end of the upper cable section is
fitted with a lower termination, and the upper
end of the lower cable section is fitted with
an upper termination. The lower termination
inherently has a lug termination, but the
upper termination needs to be fitted with a
bonding termination (Ericore/UTSP) and lug
(TERMLUGCOUPL) to allow it to be lugged.
Each of these two lugged terminations
must be electrically bolted together and to
a suitable conductive structural point (see
Figure
29
).
In some installations, both lugs can be
directly connected to a suitable conductive
structural point, but in some installations
it will be more convenient to connect both
lugs to a small busbar, and have this busbar
connected to a suitable nearby conductive
structural point. Note that the conductor
used in this case must be a minimum of
16
mm
2
(
4
AWG) and should not exceed
5
m (
200
in.) in length. A suitable conductive
structural point may be either structural
steel work or conductive properties within
concrete panels or slabs.
These joints should not be exposed to the
weather and are usually located in a service
shaft. Very tall buildings will have a number of
connection points depending on their height.
Details of where to provide the joint will be
provided by the nVent ERICO application
engineers, after consideration of the
building details.
Figure
28
: Upper and lower terminations to splice
the Ericore by using ground bar connected to the
rebar or the structural steel
Ericore Lower
Termination
Busbar connected
to conductive
structural point
Ericore Upper
Termination
Upper Termination
Lug Coupling
