Note
The installation method used defines the tools and accessories required.
The installation steps refer to:
1. Civil works
2. Electrical connections
3. Installing the base
4. Installing the fitting
4.2 Civil works
All necessary markings such as base positions, cable grooves and so on must be accurately defined by a surveying team
before any civil works start.
4.2.1 Conduct
Cable conducts methods for bases can be divided to two groups: buried cables and saw cuts/grooves. The cable conduct
system that is used influences the base installation process and the order in which different steps can/must be carried out.
For a buried cable system, the supply cable for the fitting runs through a duct set in the sub-base of the pavement, from the
transformer pit to the underside of the base. Bases with a bottom hole are to be used with this cable system.
For saw cuts/grooves cable system, the supply cable for the fitting runs through saw cuts made in a pavement. The saw cut
size must be in relation to the number and the diameter of cables to be placed in it. It is recommended to bury cables to a
depth of at least 30 mm. Bases with side access are to be used with this cable system.
4.2.2 Coring
Cut a hole for a base:
•
Hole dimensions for Base 8”: Ø245 mm, depth 145 mm.
•
Hole dimensions for Base 12”: Ø345 mm, depth 160 mm.
After cutting, break out and remove the hole-centers for the base and for the bottom to access cables, if required.
When installing a base with bottom access, cut a central hole into the sub-base (≤ Ø100 mm for Base 8”, ≤ Ø130 mm for Base
12”) to be able to reach the cable duct.
When installing a base with side-access, make saw-cuts and chamfers in order to access cable-inlets.
Cable conduct chamfers
Image examples
When installing Base 8” / 12” for saw cut/grooves cable system, cable
cuts must be chambered as shown in the figure.
It is recommended that longitudinal angles of the grooves should
not exceed 30 degrees.
It is also important that minimum bending radius for the cable type
to be used is not exceeded in any part of the groove.
For more information, see the cable manufacturer’s technical data for
minimum radius.
Figure 13: Cable conduct
RELIANCE Shallow Base
Installation
14
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Summary of Contents for RELIANCE Shallow Base
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