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IRON WORK INSTALLATION
through this section. This raised section divides the child trough in two
portions. The portion towards the front side of the cabinet is used to lay
subscribers and trunk cables coming from mother trough. The other portion
on the rear side of the cabinet is used to lay the Base module to central
module cables. In each child trough assembly, there are two such sections one
on the left hand side and the other on the right hand side of the assembly
namely power trough (left) and power trough (right) respectively. The child
trough assembly is mounted on two support box assemblies of a suite. Six
nos. of bolts of size M8X20 alongwith washer are used for fixing the child
trough assembly with the support box. The fixing procedure is shown in Fig.
3.8 and Fig.3.9. List of materials required for fixing one child trough
assembly to support boxes is given in Table 3.4.6. The alignment of the
vertical pillar is checked with the help of plumb bob and then the nuts, bolts
are tightened. Nut insert covers are used over the nuts to avoid scratches on
cables while laying.
After routing all the cables False panel assembly-2 (trough) and false panel
assembly-3 (trough) are fixed on to the child trough. Each panel is meant for
two cabinets. With this, the cables dropping from child trough to the cabinets
are not visible from the front and from the rear. Each child trough assembly
is fixed with false panel assembly-2 (trough) and false panel assembly-3
(trough) on left and right side of the assembly on both the front and rear side
as shown in Fig.3.14.
The opening formed between the mother trough assembly and child trough
assembly on the support box on the vertical pillar assembly (front) of the last
suite is covered by End plate-2. This is shown in Fig.3.13.
The opening formed between the mother trough assembly and child trough
assembly on the support box on the middle vertical pillar of the last suite is
covered by End plate- 3. (Refer Fig.3.13)
All openings between the mother trough assembly (R) and child trough
assembly on the support boxes on the vertical pillar on Right Side of the
suites, except the last suite, is covered by end plate-5. (Refer Fig.3.13)
The opening between the mother trough assembly (R) and child trough
assembly on the support box of the Vertical pillar on right side of the last
suite is covered by End Plate-I. (Refer Fig.3.13)
The uncovered portion in the support box assembly on the vertical pillar assy
(front) is covered by cover plate (support box). (Refer Fig.3.13)
INSTALLATION MANUAL
33
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