ERICO 3000 ERITECH SYSTEM - Manual (Page 23)

INSTALLATION, OPERATION AND MAINTENANCE MANUAL
21
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When using metallic lower
sections of mast (ie: aluminum),
then the downconductor MUST
be secured with ERITECH
® brand
of saddles to the mast at 1 m
(40 in.) intervals (max.). The
mast in turn must be electrically
bonded to the nearest conductive
structural point. In this case, the
structure bonding braid must
connect to the inline coupling,
(see Fig. 14).
After routing the downconductor,
it must be kept in constant physical
contact with the structure via
conductive fixings as follows:
t
The top 10% of the downconductor
from the terminal must be secured at
least every 1 m (40 in.). This includes
metallic mast sections.
t
The lower 90% of the downconductor
must be secured at least every 2 m (80
in.).
t
This includes routing inside any type of
conductive pipe or conduit, (see Fig. 17).
t
When mechanical fastening of the
cable every 2 m (80 in) is not possible,
a maximum unsupported length of
35 m (114 ft) is allowed as long as the
installation adheres to the electrical
bonding requirements (see use of cable
ties in figure 17).
ERITECH
Saddles at
1 m (40 in.)
intervals
(max.)
Aluminum Mast
ERITECH ®
ERICORE
To nearest conductive
structural point (steel
work, concrete
re-inforcing, etc)
Figure 14: Connection of Structure Bonding
Braid in FRP and F.S. masts.