Tuesday, June 2, 2020

Method Statement for Electrical Installations of Cable, MDB, SMDB, DB, MCC & CB

1. Purpose

The main objective of this method statement (MS) is to define step by step procedures to implement the equitable practices for Installation of Distribution Boards (DB), Sub Main Distribution Boards, Motor Control Center (MCC), Power Distribution Board (PDB) & Circuit Breaker (CB) through the technical guidelines consist of herein so as to ensure that the job execution complies with specification and serves the required function to suitable level where associable in the installation project.

2. Scope

This method statement (MS) highlights all proceedings regarding Installation of Distribution Boards (DB), Sub Main Distribution Boards, Motor Control Center (MCC), Power Distribution Board (PDB) & Circuit Breaker (CB) as the following:

3. Installation of Cable, MDB's, SMDB, DB, MCC & CB.

This installation methodology is to be read in conjunction with the significant (Inspection Test Plan) ITP highlighting the responsibility and the quality verification to be execute by several parties.

4. Responsibilities

Accountability or Responsibilities for establishing that the steps in this procedure shall be conducted are particularly at important steps in the procedure:

4.1 Project Manager (PM)

  • Project Manager (PM) is complete accountable for the project in terms of work execution, health, safety, planning & quality. The Project Manager will keep the planning improvement and proper essential coordination of works with the main contractor.
  • The project activities development shall be conducted as per planned schedule and all the tools, machinery or equipment's required to execute the works shall be possible easily available and in safe and good condition as per project planned schedule.
  • Proper consideration is paid to all health and safety initiatives and quality control (QC) in coordination with Safety Engineer/Officer and QA/QC Engineer. 

4.2 Construction Manager (CM)

  • Construction Manager (CM) is accountable/answerable to supervise and control the work on project site.
  • Coordinating and accommodating with QA/QC Engineer and site Team and foremen for all activities on site.
  • Control and sign all Work Inspection Requests (WIR's) prior issuing to Consultant approval.

4.3 Site Engineer (SE)

  • This method statement (MS) to the system shall be implemented as per the Consultant project conditions and approved Shop Drawings (SD).
  • Provision of all proper essential information and distribution of authoritative roles to his Construction team.
  • The work development shall be continuously observed and reviewed as per the planned scheduled program and he will report to his superiors.
  • The continual essential and proper coordination with the Safety Engineer or safety officer or safety representative to make sure that the job tasks are being conducted in secure & safe working atmosphere.
  • The continual essential and proper coordination with the QA/QC Engineer for any activity to be accomplished and set up for the appropriate inspection for the completed works.
  • The site engineer will make sure the implementation of any request that might be requested by the Consultant.
  • Decisive daily development report shall be gathered for all the tools, machinery, equipment and workforce.
  • The Site Engineer (SE) will involve efficiently in the work and observe, inspect and review the same against the daily report received from the site foremen.
  • The passage of all the revised information to the Foremen and ensure that it's being carried out properly.

4.4 QA/QC Consultant/Engineer   

  • Site Engineer/MEP Coordinator will monitor the executions of activities at the worksite and should be as per the approved drawings & sketches concerning project specifications.
  • Ensure WIRs and MlRs are being raised for activities promptly and inspected by the Consultant.
  • Check and ensure that all activities completed before offering for consultant inspection.
  • He will follow and carried out all the relevant tests as per project terms.
  • He Will get the obligatory clearance before Consultant's inspections.
  • Site Engineer/MEP Coordinator Should obtain any required civil works clearances.
  • Coordinate with the site construction team.
  • He will help the Consultant Engineer/Inspector during inspection procedures.

4.5 Site Engineer/MEP Coordinator 

  • The method of statement to the system (work execution, safety, planning & quality) shall be enforced and carried out as per the Consultant project terms and approved drawings & layouts.
  • planning of all required and intended instructions, data and assigning of responsibilities & accountability to his worksite/FM/FLS/Firefighting team.
  • The worksite activities developments and improvements shall be monitored, observe as per the outlined work program and he/she will make all efforts to provide comprehensive reports to his colleagues, team and all other stakeholders.
  • The continue consultation and coordination with the HSE Manager/ Engineer/Officer to ensure that the tasks are carried out in a safe working environment.
  • The continual and steady planning and strategies with the QA/QC Engineer for any works to be carried out and initiate for the Inspection for the finished works.
  • The Quality assurance (QA) & Quality control (QC) Consultant/Engineer will make ensure the application and insertion of any request that might be asked by the Consultant.
  • All proper daily progress reports shall be procured and collected for all the equipment, machinery, tools, appliance and procedures workforce.
  • Site Engineer/MEP Coordinator will enlist and engage in the work and check the same against the daily report received from the Foremen.

4.6 HSE Manager/ Engineer/Officer

  • The duty of HSE Manager/ Engineer/Officer work out for the successful, safe and secure implementation of all occupational safety, health, and environmental (SHE) initiatives following the HSE plan and that the whole workers are known its appropriate implementation.
  • The proper implementation of occupational HSE safety measures is suitable to keep a safe and secure working environment on the work activity.
  • Health and Safety Inspection, observations and coordination of all the worksite/projects activities and HSE training/orientation, personnel in accident/incidents prevention and its appropriate required reporting to the Construction Manager and the Project Manager.
  • To make inspections to ensure the worksite is maintained in a clean and tidy manner (housekeeping).
  • To ensure that only competent and trained personals shall operate the machinery, equipment and power tools.
  • To implement a strict compliance policy regarding the use of PPE.
  • To work out for the promotion of positive safety culture at worksite/project.
  • Making ensure that high-risk exalted areas are provided with all safety and health measures such as barricade tape, safety nets, PPE, etc.
  • Ensure safe access to a worksite.

4.7 Store Keeper (SK)

  • The storekeeper is responsible for all Store operations ensure the required material delivery to the worksite and that material storage in safe from any critical damage or misuse.
  • Ensure Proper housekeeping in-store/warehouse.
  • SK will endorse the receiving of materials at the worksite in coordination with QA/QC consultant /concerned Engineer.

4.8 Site HAVC/MEP/Construction Supervisor

  • All level of supervision will make sure and make strategy in carrying-out of work and the appropriate distribution of all the available resources in coordination with the Site Manager/Engineer regularly.
  • Will observe and prepare and share daily reports of the activities are accomplished and coordinated for future strategies with the Site Manager/ Engineer.
  • Consolidate all the QA/QC and HSE requirements as asked by the concerned Manager /Engineer and or consultant.
  • Observing all unsafe condition, violence, incident, near miss, or requirement and reporting immediately to the Site Manager/Engineer.

5. Equipment &Tools 

  • All Main Distribution Boards (MDB's), Sub Main Distribution Board (SMDB's), FDB's, MCC's & Capacitor Bank (CB's) shall be in line with approved material submittal and as per approved drawings.
  • Portable Hand Tools (e.g., abrasive wheels, grinders, lawnmowers, powered operated drills, portable circular saws, portable belt sanding machines, explosive-actuated fastening tools, and jacks), 
  • Portable Drilling Machine.
  • Grinding Machine.
  • Insulation Testing Equipment (ITE).
  • Digital Multi-meter (VOM (volt-ohm-millimeter, Digital mustimeters (DMM, DVOM), Measuring Tape.
  • Ladder/ Scaffolding.
  • Safety PPE’S such as safety shoes, safety helmet, safety glasses, HV flora cent vest, and multi-role and heavy-duty safety gloves to ensure the maximum ability of safe work and a dust mask when required.

6. Procedures of installation Switch gears 

  • Always be ensure that only competent, trained, authorized, licensed professional workers only shall operate the power tools.
  • Ensure that temporary live electrical cable management plan shall properly develop and implement.
  • Proper required standards compatible with personal protective equipment (PPE) to be worn while carrying out routine daily activities while working in energized circuits.
  • To make it possible to provide proper required adequate lighting system in the working various areas particularly at night shifts. 
  • All Safe lifting operations and shifting of L V switchgear panels and its related possible critical hazards and risks shall be identifying.
  • Ensure work activities areas shall be secured and safe with barricade tape, safety nets and warning signage/posters, proper tagging to be provided (Danger: Low Voltage).
  • Ensure lockout tag out LOTO) procedure to be followed and implemented during the execution of work.
  • Emergency response plan procedure shall be developed as per the worksite/project condition during the execution of the various activity.
  • Ensure that training cards issues to identify the power tools operatives.
  • To ensure all material or machinery shift or used by using mechanical aids to avoid any ergonomics issues.
  • Always proper permit to work (PTW) to be applied and obtained to start work on the required area.
  • Calibrated, certified and tested from third parties instruments only to be used.

7. Work Methodology

  • All material delivered to worksite should be inspected properly by QA/QC Engineer and check if it is stored appropriately as per the manufacturer's recommendations.
  • Material Inspection Request (MIR) shall be raised for the inspection of materials received at the site by Sub-contractor QA/QC Engineer to the Consultant Engineer.
  • The strict level of supervision shall be practiced to avoid any incident/accidents or near misses.
  • Sub-contractor’s Quality assurance (QA) & Quality control (QC) Engineer shall coordinate with other contractors and arrange inspection for installation to the Consultant Engineer.
  • MEP QA/QC Engineer is accountable for all installation jobs for getting the work inspected and approved by the Consultant Engineer.

8. Handling and Storage 

After getting of all the all Main Distribution Boards (MDB's), Sub Main Distribution Board (SMDB's), and Capacitor Bank, etc. (CB's) and accessories at the site, necessary precautions shall be taken for unloading, shifting and storage, as below:

  • Storage of material shall be done in a fully covered and dry space at all the time.
  • All received materials at worksite shall be inspected as per approved material submittal.
  • Any miscalculations, damage and destruction in the material will be notified and reported for further action.
  • Site Manager/Engineer has to make ensure that all Panel boards used at site are of free from any damage or deformity of any kind. Any minor damages/malfunction observed shall be repaired appropriately and in case if the repairs could not be carried out properly, the panel boards are to be sent to assembler for rectification, after all, procedures accomplished. 

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9. Generic Installation Procedure

  • Make sure that the activates area is tidy, ready and safe to start the installation.
  • Ensure to take all proper HSE measures to start the installation of MDB's, SMDB's, FDB's, MCC's, CB's and accessories
  • Ensure the installation of Main Distribution Boards (MDB's), Sub Main Distribution Board (SMDB's), and Capacitor Bank, (CB's) and adornments at worksite carried out by following manufacturer's installation recommendations, the requirement of applicable standards, regulations and technical guidelines and in accordance.
  • Before starting the electrical installation, always refer to the approved drawings and outlines related to the area of installation.
  • Ensure the materials are stored properly and there is no mark of damage or deformity of any material from site store all materials and accessories should also be free of dust and oil etc.
  • While installation the Main Distribution Boards (MDB's), Sub Main Distribution Board (SMDB's), and Capacitor Bank, (CB's) Ensure that the issued materials are of approved specifications, submitting and as per the requirement of the area shop drawings.

10. Installation Method for MCC, CB & MDB

  • Various electrical components such as MCC, CB installation worksite shall be carried out only concerning approved shop drawings.
  • All parts of MCC, CB & MDB such as relays, fuses. Current Transformer (CT's), meters etc. shall be verified against the approved material submittal.
  • Make sure that the floor surface is prepared properly with base frames grouted to install the switch gear.
  • The most important step which is keeping minimum clearance of 800 mm at the backside of the panel, so that easy access for termination of cables and other maintenance works in future can be conducted.
  • Panel boards shall be installed serially and with Level Vertical following the Manufacturer’s instructions/endorsements, approved site layout and as per site specifications.
  • Closely and carefully examine and heck cabinet interconnections, bus bar connections, control wire connections between the cubicles after appropriate alignment of the sections cubical as per manufacturer's drawing, recommendations, guidance and approved shop drawing.
  • All knockouts made on the panel covers shall be filed and provided with grommets to avoid sharp edges injuries and unused knockouts shall be protected.
  • The connection of bus bar trunking with all panel boards shall be done firmly with appropriate supports.
  • The Cables bending radius should be less than the 8 times of the cable diameter following the Manufacturer's instructions/guidelines.
  • All installing activities such as Cable pulling, termination & crimping shall be conducted as per cables method of statement.
  • The completion or termination procedures of installation cables shall be done using approved material submittal for cable glands and lugs. Glanding and connections should be carried out only by competent and trained electricians under appointed supervision of electrical site Engineer.
  • All distribution panel boards and switch gears shall be provided with proper earthing connections as per approved shop drawings.
  • Manufacturer instructions are to be adopted for all relay, timer and other breaker current settings, as per the total connected loads. 
  • Identification labels/posters/tags of approved type shall be attached on all panel boards.
  • Co-ordinate with the Main Contractor and ensure the provision of chequer plates on the open trenches inside the LV /Electrical rooms.
  • Be sure that all cable entries and other openings/vents of Electrical/LV Room, walls, Floor are done with proper recommended and approved sealant.
  • The manufacturer's representative to verify the worksite installations of MCC, CB & MDB and provide acceptance of same before Energization/functioning of Panel boards after getting clearance from Site Manager/Engineer.
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11. Installation Method for SMDB & FDB 

  • Manufacturer’s representative to verify the site installations and provide acceptance of same before the Energization of electrical Panelboards after getting and receiving clearance from Site manager/Engineer.
  • Installation job shall be conducted only by following the approved shop drawings of the latest editions.
  • Make sure that all civil and finishing works are accomplished and installation is released and cleared by civil section to continue with Distribution Board (DB) installations. Also, ensure that the work area is tidy and secure to commence activities.
  • Ensure the wall surface is well prepared to install the Distribution Boards (DB).
  • Height of the Distribution Boards (DB) shall be properly maintained as per recommended and approved shop drawings so that easy access for termination of cables and other maintenance works can be accomplished.
  • Connection of cable trays and cable trunking with all Distribution Boards (DB’s) shall be done firmly with appropriate supports.
  • All knockouts work made on the panel covers shall be filed and added with grommets to avoid sharp edges injures and extra/unutilized knockouts shall be covered. All cable entries shall be protected and sealed properly.
  • Termination of cables shall be accomplished using approved cable glands and lugs glanding and connections should be carried out by only competent technician and electricians as per the approved/recommended shop drawing. Sub Main Distribution Board (SMDB's) and FDB's shall be provided with appropriate earthing connections as per approved shop drawings.
  • Doors of Sub Main Distribution Board (SMDB's) and FDB's are to be earthed with the flexible connection.
  • Identification of approved labels, tagging, and pestering type shall be placed on the Sub Main Distribution Board (SMDB's) and FDB's.

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