1 SCOPE
2 REFERENCE DOCUMENTS
3 AUTHORITIES AND RESPONSIBILITIES
4 MATERIAL INSPECTION, STORAGE, AND HANDLING
5 METHOD OF INSTALLATION WORKS
5.1 Work Site Preparation prior to Installation
5.2 Transport, Loading and Unloading of Bus Sections
5.3 Cleaning of Equipment prior to Installation
5.4 Installation of Supports
5.5 Equipment Installation
6 TOOLS AND EQUIPMENT
7 SAFETY PRECAUTION
8 INSPECTION
Isolated Phase Bus Installation Procedure | Method of Statement
1 SCOPE
This method covers the installation procedure of Isolated Phase to be implemented in Electrical Installation Works. Specific activity will be
done according to the Project’s Scope of Work and contractual obligation.
2 REFERENCE DOCUMENTS
a) Applicable/ Approved International Standards
b) Issued For Construction Drawings
c) Manufacturer Instructions
3 AUTHORITIES AND RESPONSIBILITIES
Site Manager – Determine all requirements needed in order to comply with contractual
requirements and safety standards.
Electrical Superintendent – Ensure that work once started is carried out as planned and that
the applicable standards are complied with. Check working methods and precautions to be
taken by the supervisors/foreman before commencing work.
Field Engineer – Ensure that all related works are carried out in accordance with approved
Released for Construction drawings, specifications, schedule, quality and safety. Report to
Construction Manager.
Safety Officer – Ensure that “Safety, Fire, Loss Prevention” program or Safety Plan was been
implemented and monitored.
Supervisor/ Foreman – Supervise all field installations Reports to Electrical Superintendent.
QC Inspector – He shall be responsible for conducting surveillance and inspection duties for
work and ensuring quality compliance and efficient recording and reporting of results as
required. He shall review all relevant documents, material conformance certificates and non
conformance reports and shall receive all internal requests for inspection from various sections
of implementing work and prepare (RSI) Request for Site Inspection as per schedule work
priorities and proceeds the Quality inspection with the client, owner representative as required.
4 MATERIAL INSPECTION, STORAGE, AND HANDLING
a) Check delivery packing list. Perform visual inspection of equipment’s nameplate and
specification according to the approved equipment data sheet and vendor packing list.
b) Perform visual and physical inspection of equipment and its accessories for
completeness and any damage. Check to make sure that all parts described in the
shipping list are complete.
c) Check manufacturer’s instructions for the proper storage and handling of equipment.
If equipment parts and accessories are to be stored, a suitable storage area and
acceptable to the Client must be obtained.
d) Store busway sections and fittings in a clean dry location with adequate air circulation
to prevent condensation. The location must be free from dirt, fumes, water and
physical damage.
e) Check manufacturer’s instructions for handling of bus sections. Weight and length of
bus section to be considered in using lifting equipment.
f) Caution is necessary for lifting and moving of equipment. Failure to follow proper
handling procedures could cause equipment to tip and lead to severe personal or
damage to equipment.
g) Any damage found during this activity will be inspected and reported to determine the
corrective action needed.
5 METHOD OF INSTALLATION WORKS
5.1 Work Site Preparation prior to Installation
a) Check availability of the latest approved engineering drawing, general arrangement
drawing and manufacturer’s manual. It must be readily available prior to installation
works.
b) Prepare tools and materials to be used. Broken or damaged tools must not be used.
c) Obtain work permit. All work personnel must wear complete PPE (hard hat, safety
shoes, hand gloves, etc.)
d) Conduct toolbox meeting for all working personnel prior to start of work. Discuss the
step by step of work to be done and safe practices to be made
e) Check if area is also clear for access; check any obstruction and foreign materials are
removed. Verify clearance from civil contractor prior to start of work.
5.2 Transport, Loading and Unloading of Bus Sections
a) Check manufacturer’s manual for safe instructions in loading, unloading, and lifting of
materials.
b) Check the bus identification tag to determine sections need to be transported, loaded,
and unloaded consecutively.
c) The recommended method of lifting the crates at the job site is by overhead lifting
with nylon slings.
d) Lifting activity must not be done during bad weather condition. All lifting activity must
follow the safety requirement initiated by HSE department.
e) Check if loading and unloading area has enough space for the activity.
f) Do not drag bus across the floor. Handle busway with care to avoid damage to internal
components, enclosure, and its finishes. Never subject the busway to twisting, denting,
impact or rough handling.
5.3 Cleaning of Equipment prior to Installation
a) Once the equipment has been removed from the receiving or storage area a full visual
inspection should be performed to insure no damage was done during the transit of
equipment to the installation area.
b) If the IPB has been subjected to dry dusty environments, a general interior cleaning
may be required prior to installation. Generally only water-wet rags are required to
remove dust, dirt and debris.
c) Do not damage the insulators during cleaning. The insulators can be quickly removed
and re-installed if required for cleaning.
d) If the interior of the IPB enclosure is found to have accumulations of water, all water
must be removed prior to installation. The IPB system must remain completely free of
moisture during the installation process.
5.4 Installation of Supports
a) To expedite the steel support structure erection, steel support base plate drill pattern should be checked against the foundation anchor locations and elevation of the foundations prior to support column installation.
b) The steel support design drawings can be utilized to verify that the anchor locations and support base plates drill patterns match.
c) Verify elevation for assembly of support.
d) The dimension must be verified before grouting between the foundation and steel base plate so adjustments can be made.
e) To save time and prevent work from an elevated position, the saddle support assemblies (whether bolted or welded type) can be pre-installed onto the steel support beams prior to erecting the steel support structures.
5.5 Equipment Installation
a) IPB system must be loose fit installed from one point to another to insure that once final welding is complete, no rework will be required.
b) Begin installation from a mid-fixed point location such as a building wall or generator circuit breaker (otherwise from one terminating point or endpoint).
c) If the system has no mid-point equipment, installation begin at the main bus terminal interface point (generator or GSU transformer) and proceed by installing IPB shipping sections from that point to all other interface points.
d) Care should be taken in either case to insure that the IPB system from one point to others will fit up properly.
e) The first section(s) installed should be verified that the end points, support points and terminal interface points all match the design drawing locations.
f) Do not begin welding until all bus sections (at shipping splits and all terminal interface points) have been confirmed to fit-up properly at the point of interface.
g) All sections should have only the conductor joints tack welded together until all interfacing points of the bus run and conductor joints have been verified to fit correctly.
h) Flexible connectors and adapter bars should be temporarily installed to verify that all conductor joints fit properly.
) Prior to welding any joint, both the enclosure and conductor welded joints and bolted joints, at all interface points, should be verified for proper fit up.
j) The proper elevation and dimensional gaps, shown on the project design drawings, must be confirmed prior to full welding and/ or final fit up of equipment.
k) Termination sections to be installed before final welding of adjacent sections.
I) After welding is complete, clean up welds and remove all weld splatter from the exterior of the enclosure.
m) Paint the welded area and touch up any bare sections of the enclosure.
n) Prior to installation of wall/floor seal assembly or firestop bus section, the seal off bushing or firestop should be verified to be clean, dry and free of dust and/or dirt.
o) Complete grounding installation for Bus System.
6 TOOLS AND EQUIPMENT FOR ISOLATED PHASE BUS INSTALLATION
a) Electrician’s standard tool box (pliers, spanners, screw drivers etc.)
b) Boom truck, forklift
c) Measuring tape
d) Spirit level and plumb line
e) Calibrated Torque Wrench
f) Welding Machine
g) Chain block
h) Warning sign and barricade tape
i) Electrical drill and drill bits
j) Nylon Slings
k) Warning sign and barricade
7 SAFETY PRECAUTION
a) All work activities to be performed in a safe manner following the Company Safety Policies and Procedures. Safety checks are to be performed before any work is executed.
b) Ensure that work permit is obtained identifying the applicable work to be performed.
Safety requirements may also be indicated in the work permit. It must also be kept available and visible to work area.
c) Ensure that all personnel in adjacent areas throughout any system are aware of the activities and the hazard that could lead to potential danger.
d) Concern working personnel must always wear PPE such as safety hard hat, glasses, safety shoes, hand gloves, cover all, etc.
e) Perform daily toolbox or safety talk to keep all worker regarding safe procedure and safety requirements.
f) Ensure that all tools and equipment to be used are free from damage.
8 ISOLATED PHASE BUS INSTALLATION INSPECTION
Quality Control personnel verify that Bus System installation conforms to the approved engineering drawing, manual instructions, and specifications of the project. Request for Site Inspection (RSI) will be prepared according to the approved Inspection and Test Plan to notify Client’s inspection representative and concern person regarding scheduled dates of inspection. Once inspection is done and accepted, checklist must be signed and records are properly kept.