7.1 PRELIMINARY ACTIVITIES/ APPROVALS
· All
necessary work permits shall be obtained prior to the commencement of any
activity on site, and shall remain valid throughout the entire duration of the operations.
· All
conduits and their accessories shall be inspected upon receipt for any physical
damages.
· All
interfacing activities shall be fully coordinated with the Supervision
Consultant.
· All
works will be undertaken as per the approved MS, if any situation arise that
results in the works not being as per the approved MS the works will be stopped
and reassessed as the MS amended.
7.2
PRE-INSTALLATION ACTIVITIES
· Secure the approval of shop drawings and
submittals of the materials to be used for the activity.
· Review the approved shop drawings intended
for the area.
· Prepare all the materials needed based on
the approved material submittals. Materials should be subjected to QA/QC
inspection upon delivery/prior to installation.
· Storage of materials shall be done as to be
protected from weather and mechanical damage and as per the manufacturer’s
instruction.
· Check drawings for proper coordination with
other disciplines using latest information received in specifications and any
RFI concerned.
· Verify if the area is ready for the
installation activity.
· Prepare all the materials needed based on
the approved material submittals.
· Prepare the manpower required for the
installation.
· Prepare all the tools required for the
installation.
· Ensure that all workers involved are
wearing their Personal Protective Equipment (PPE) before proceeding to the work
place.
· Mobilize all the materials, tools, and
manpower on the work area.
· Provide caution signs or signage around the
working area. Set-up a ladder or scaffolds to a height depending on the nature
of work in order for the worker to move freely and without disturbances. Always
secure a safety belt or a full body harness when climbing or working above 5
feet in height and must be hooked in a safe lifeline. Also use safety glasses
or goggles for eye protection from dust and other foreign materials.
7.3 WORKING AT HEIGHTS
·
Fixed
RMD platform shall be used to perform working at heights.
·
Scaffold
assemblies shall be as per the safety standard free from damages and defects.
·
Scaffold
shall be assembled by the certified scaffolders.
·
Scaffold
shall be inspected by the certified scaffold inspector after each
assembly/modification and tagged.
Weekly inspection shall be carried out by the scaffold inspector and tag
·
updated.
·
Hazards, risk, consequences and the precautionary measures when working
at heights shall be included in the daily pre-task briefing.
·
All personnel using scaffold shall wear full body harness for working
above 2 meter heights to arrest potential fall as an additional precaution.
·
Lanyard of the full body harness shall be anchored on the anchorage
point on the scaffold.
·
Scaffolds shall be visually inspected by the foreman prior to use on
daily basis.
·
All materials shall be properly placed and secured on the working
platform.
·
Toe board protection
shall be provided to avoid materials fall.
·
Mobile scaffold shall
not be push or pull to move when the platform is engaged by the man or
materials.
·
Castor wheel must be
locked during the usage.
·
Mobile scaffold shall
not be used on the slope surface.
·
Stabilizers shall be
assembled to ensure adequate stability.
·
Ladder shall be used
as only means of access not as work platform, as far as reasonably practical.
·
Ladders shall be
positioned in safe manner and must be supported by the stand by person to
provide access/egress.
·
RAMS and STARRT shall
be briefed to the working crews by the supervisor on daily basis and recorded.
7.4 CONDOUITING WORKS
7.4.1 1st Fix –G.I Rigid
Conduiting:
1)
The
entries of GI conduit fittings shall be so designed that reliable water tight
joint can be made between the conduit and fittings.
2) GI conduits shall be so constructed that it
is possible bend the conduit easily with the aid of a bending machine and all
conduit and conduit fittings shall be of the threaded type.
3) The minimum size of GI conduit that may be
used in electrical installations shall be 20 mm other sizes of conduits shall
be limited to the following diameter: 25 mm, 32 mm, 38 mm and 50 mm.
4) Rigid non-metallic conduits shall be
installed generally in accordance with
the requirements set out for metallic conduits shall allow for the longitudinal
expansion and contraction of the conduits.
7.4.2
1st Fix –PVC Rigid Conduiting:
1) The entries of PVC conduit fittings shall be
so designed that reliable water tight joint can be made between the conduit and
fittings.
2) A Vinyl solvent shall be used for permanent
joints and expansion couplers.
3) PVC conduits shall be so constructed that it
is possible bend the conduit easily with the aid of a bending spring and all
conduit and conduit fittings shall be of the unthreaded type.
4) The minimum size of PVC conduit that may be
used in electrical installations shall be 20 mm other sizes of conduits shall
be limited to the following diameter: 25 mm, 32 mm, 38 mm and 50 mm.
5) Rigid non-metallic conduits shall be
installed generally in accordance with
the requirements set out for metallic conduits shall allow for the longitudinal
expansion and contraction of the conduits.
7.4.3
1st Fix –PVC & GI flexible
Conduiting:
1)
Flexible
conduits may be employed for connecting electrical motors and other equipment
subject to adjustment of position and vibration to the fixed wiring.
2)
PVC
& Metallic flexible conduits shall not be used as the sole means of
providing earth continuity and a separate earth continuity conductor of
appropriate size shall be provided.
3)
Flexible
conduits shall only be run exposed and shall be so positioned that they are not susceptible to mechanical
damage. Where necessary flexible conduits shall be adequately supported.
4)
The
ends of flexible conduits shall be securely anchored to the fixed conduit or
equipment to which it is attached by approved flexible conduit adapters that
maintain effective mechanical continuity securely in position without
distorting it.
5)
The
flexible conduit shall not be used as part of the earth conductor.
6)
A
separate earth conductor shall be installed to comply with the same
requirements for rigid conduit installations.
7)
The
maximum length of a flexible conduit run shall be 2.50 meters.
8)
Where
flexible conduit is installed less than 1.50 meters above a floor in a position
where it may be easily disturbed or reached, it shall be supported at intervals
not exceeding 300 mm.
9)
Except
where terminating at motors or at other equipment which requires a free length
of flexible conduit to provide for normal movement.
All required safety precautionary
measures shall be taken before the start of the work and during the execution
of this works as per the Risk Assessment provided,
refer to the attached risk assessment.