Penetrations
Before routing the downconductor through
any penetrations, ensure that:
• If un-terminated, the hole is a minimum of
50
mm (
2
in.) in diameter.
• If terminated, the hole is a minimum of
60
mm (
2 ⅜ in) in diameter.
• The hole must be smooth and without
sharp edges.
• A max of
2
m (
6
ft) of non-conductive
conduit can be used, to protect the Ericore
cable from damage, when routed through
concrete or masonry opening.
• A max of
1
m (
3
ft) of non-conductive
conduit can be used over any part of the
top
10
% of the cable length.
• Ferro-magnetic counduit is never used.
If either side of the penetration requires
environmental protection i.e.: waterproofing,
air-con pressure seal etc., use a standard
professional method of protection.
Figure
8
: Correct & incorrect cable routing methods
Routing
The route taken by the
downconductor is very important
and must follow these rules:
• Carefully survey the intended route of the
downconductor immediately prior to the
installation to check for any alterations
that may effect the original design, i.e.:
structural changes, new antenna or mast
installations, air conditioning towers or
ducting, etc.
• Use the most direct route practical to
minimize the downconductor length.
• To minimize the risk of side-flash,
DO NOT route the downconductor back
beside itself after change of direction,
i.e.:
180
°.
• Minimize the number of bends.
• Minimize the strain on the downconductor
during installation.
• The Ericore cable must be installed in a
downward fashion.
INCORRECT
CORRECT
INCORRECT
Radius
<
500
mm
(
20
in.)
<
2000
mm (
80
in.)
