· To implement the correct practices for Installation of PVC conduits
B.
RESPONSIBILITIES
· Engineer In-charge (Fire detection) / Site Engineer (Fire detection )/ QA, QC/ Technician
C.
TOOLS AND
EQUIPMENT
·
Portable hand tools.
·
Conduits, Sockets, Bends, Junction Boxes
and etc.
·
Solvent Cement
·
Marker Pens
·
Conduit Cutter
D.
PPE REQUIRED
· Helmets
· Gloves
· High
Visibility Clothing
· Safety Shoes
E.
HANDLING
& STORAGE
· On receipt of the PVC conduits at site necessary precautions shall be taken
for unloading, shifting & storage, as follows:
· All PVC conduit and accessories delivered at site shall
be carefully off-loaded by developing necessary / adequate manpower and
equipment in such a manner that no damage shall be caused to conduits and
accessories.
· All conduits and accessories will be inspected, handled
and stored properly upon receipt at site.
· Conduit materials shall be stored in a place free of
water and properly covered to avoid any damages due to weather affect.
· Ensure that PVC conduits are not dropped onto hard
surface and will not be dragged along the ground.
· Any discrepancies, damage etc. found will be notified and
reported for further action.
F.
INSTALLATION
· Ensure that the work area is ready and safe to start the
installation of electrical PVC conduits.
- Prior to start the installation, refer
the approved shop drawings related to the area of installation and ensure
required material is available at site as per approved
material submittals.
- Mark the location of the junction boxes.
- Install the PVC conduits utilizing the
steel reinforcements as supports by using necessary binding wires.
- The PVC conduits shall be bonded
tightly to the junction boxes.
- The jointing process of PVC conduit will
be followed as mentioned below :
o
Both the
joining ends of conduits will be cleaned from inside as well as from outside.
o
A thin layer
of solvent cement is applied to the inner surface of the coupler.
· (C) Push the conduit ends fully into the coupler by
slight twisting action & remove the spilled or surplus solvent cement
from around the joint. Make sure the conduit has entered fully into the
box spouts and couplers.
o
Make sure
that the joint is tight enough and entry of water into the conduit
through joints is not possible.
o
Approved
connectors / adopters will be used for connections to junction box.
- To facilitate easy cabling / wiring
sufficient junction boxes will be provided in all conduiting.
- In longitudinal straight runs the
junction boxes will be provided in every 8 meters or as applicable.
- Sufficient gap shall be provided between
conduits at cross-over locations.
- Ensure all open end of the conduit are
capped / plugged properly before concrete pouring.
- Conduits chased into wall should be
recessed sufficiently to permit for plaster cover.
- After completion of conduiting
installation for any portion, the area will be cleaned properly by
removing all surplus material, construction debris or scrap material etc.,
to leave the area in clean and tidy condition prior to concrete pour.
- After removal of concrete shuttering, all
the conduits shall be checked for blockage (wherever possible), shall
be cleaned & plugged/covered.
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