WORK METHOD STATEMENT FOR BUILDING ELECRICAL WORK

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TABLE OF CONTENTS                                                                                            

1.0   Scope

2.0   Responsibility

2.1   Electrical Manager

2.2   QA/QC Manager

2.3   Electrical Superintendent / Supervisor

3.0   Definition

4.0   Procedure

4.1   General Requirement

4.2   Installation of  Lighting Fixtures & Accessories

4.3 Installation of the Small Power Receptacles & Accessories

4.4  Installation of Raceway (conduits & cable tray)

4.5 Installation of Distribution Panel boards

4.6  Earthling and Lightning System Works

4.7  Testing Procedure

1.0  SCOPE :

This procedure covers the installation and testing of material of Small power receptacle & Lighting system

The installation of devices and support system shall be done by standard work process format identifying all the applicable activities from this procedure.  This form will show activities that require verification.

The purpose of this procedure is to establish general guidelines addressing all requirements that are necessary to assure that the installation of power receptacle & lighting system are checked and tested in conformance with the drawings & specifications.

2.0 RESPONSIBILITY:

2.1  The Electrical Manager shall be responsible for the following: 

2.1.1      Preparation of the work procedure and approval

2.1.2      Document and drawing control for Electrical work.

2.1.3      Application  to QC for inspection and testing

2.1.4      Training for Superintendents, supervisors and staff

2.1.5      Requestof inspection to QC Department according to inspection and test plan during installation works.

2.2  The QC/QA Manager shall be responsible for the following:

2.2.1      Ensure that Inspections are performed in a timely manner and recorded as per specification and standard detail drawings, as per ITP and Inspection records (IR) requirements.

2.2.2      Submission of inspection and test record for an approval.

2.3  The Electrical Superintendent / Supervisor shall be responsible for the following:

2.3.1      Preparation of inspection at site.

2.3.2      Writing a notification to Electrical Manager the completion of preparation to inspect the site.

2.3.3      Controlling of material and workers at site.

2.3.4      Assistance of inspection and testing record when required at site.

3.0  DEFINITIONS:

IFC                        :           Issued for Construction

ITP                        :           Inspection & Testing Plan

RFI                        :           Request for Inspection

4.0  PROCEDURE:

4.1  General Requirement:

4.1.1      All power receptacle, lighting fixtures & accessories received at site shall be checked, handled and stored upon receipt in accordance with Project Procedure for Material Control.

4.1.2      Installation of lighting fixtures, sockets and associated cabling shall be installed as per IFC drawings and conducted by the Electrical Supervisors and witnessed by Electrical QC Inspector.

4.1.3      Cable trays, ladders and conduits shall be manufactured by drawing & specification that are used to support and protect cables.  When the lighting, sockets and power cables have a common route they can be installed in the same cable tray.

4.1.4      Conduits installed horizontally or vertically shall be fixed by unistrut & clamp to the steel structure or fixed on the concrete walls with bolts.

4.1.5      Horizontal conduits shall be supported every 1.5m,vertical conduits shall be supported every 1.2 to Max 1.5m.  Conduits for horizontal shall be attached to supports by unistrut and appropriate unistrut clamps, while vertical conduit shall be fixed with same.

4.1.6      Conduits shall be fitted with plastic or nylon bushing at both ends to protect cable against mechanical damage.  Vertical conduits shall be sealed with compound at the upper end in order to prevent ingress of unwanted moisture, debris or insects which might damage the cable.

4.1.7      Cable entries into equipment located outdoor or in areas where wash down may take place shall be from below where possible.  When entries have to be horizontal, a drip loop shall be formed in the cable immediately behind the cable gland.

4.1.8      All cable glands shall be covered with shrouds.  Stranded conductor ends shall be fitted with a suitable crimped thimble.  Each conductor shall be identified by color of the corresponding phase.  Before connection to equipment and after completion of cable glands an insulation test shall be carried out and recorded.

4.1.9      After prefabrication of supports and before the erection of the equipment, supports shall be primary coated.  After installation, all of the primary coating destroyed by welding shall be cleaned and redone.

Lighting fixture support shall be attached to handrails when necessary by right angle clamps. Conduit attached to beams in parallel, clamps will be used.

4.2  Installation of  Lighting Fixtures & Accessories

4.2.1      Ensure that lighting fixture are not clashing/fouling with any nearby structure/ equipments and location shall be decided to have the maximum illumination.

4.2.2      Ensure that lighting fixture, support & accessories materials are handled in accordance with Material control system.

4.2.3      Verify the lighting fixture rating and specification as per project specifications.

4.2.4      Check the light fixture & support assembly to ensure stability of the installation.

4.2.5      Verify the branch circuit wiring & termination as per the panelboard schedule.

4.2.6      Ensure that continuity & megger testing are completed within the accepted value & recorded.

4.2.7      Verify the lighting fixtures illumination levels correctness using the Lumens meter.

4.2.8      Ensure that circuit list and labels are installed for maintenance service.

4.2.9      Check the type of lighting fixtures with respect to hazardous area classification drawing.

4.2.10   Check the mounting height in accordance with IFC & Typical drawings

4.3  Installation of the Small Power receptacle & Accessories

4.3.1      Ensure that socket outlets & accessories materials are handled in accordance with Material control system.

4.3.2      Verify the power receptacles rating and specification as per project specifications.

4.3.3      Ensure that power receptacle installation are not clashing/ fouling with any nearby structure/ equipments.

4.3.4      Check the power receptacle & support assembly to ensure stability of the installation.

4.3.5      Verify the branch circuit wiring & termination as per the panel board schedule.

4.3.6      Ensure that continuity & megger testing are completed & within the accepted value & recorded.

4.3.7      Ensure that circuit list and labels are installed for maintenance service.

4.3.8      Check the type of socket with respect to relevant hazardous area drawing.

4.3.9      Check mounting height in accordance with IFC & typical drawing.

4.4   Installation of  Raceways (conduits & cable tray

4.4.1      Ensure that conduits, cable trays & accessories are not clashing/ fouling with any nearby structure/ equipments.

4.4.2      Verify the required diameter size & lengths of conduits & cable trays according to project specifications.

4.4.3      Check that conduits & cable trays installation, orientation and alignment are as per design drawings.

4.4.4      Conduits shall be cleaned free of burrs and any other sharp edges throughout their entire length.

4.4.5      Check the conduit & cable trays support assembly to ensure stability of the installation.

4.4.6      Ensure that circuit list and labels are installed for maintenance service.

4.4.7      Flexible conduits may also be used in connecting to equipment for short sections where flexibility is required or excessive vibration is anticipated.

4.5  Installation of  Distribution Panel boards

4.5.1      Ensure that distribution boards & accessories are handled in accordance with Material control system.

4.5.2      Verify the distribution boards rating and specification as per project specifications & schedule.

4.5.3      Correct location shall be decided at site to avoid clash/ fouling with nearby structure/ equipments if any.

4.5.4      Verify the branch circuit wiring & termination as per the panel board schedule.

4.5.5      Ensure that all circuit list and labels are installed for maintenance service.

4.5.6      The earthing system shall be installed as per IFC drawings.

4.6  Earthing and Lightning System work

4.6.1      Earthing system shall be installed as specified materials in accordance with the IFC drawings and specifications.

4.6.2      Steel structure grounding Lugs, metal sheaths and cable armor shall be connected to grounding system.

4.6.3      Earth-bar joints or conductor fixing bolts shall be tightened.

4.6.4      Cable tray shall be connected to earth-bar system.

4.6.5      Lighting fixture and small power system shall be connected earth-bar system.

4.6.6      Installation of lightning protection system shall be conducted by the

Specified procedures in accordance with the drawing and specification.

4.6.7      Set out location of lightning conductor support and drop point and terminal base on required location points by the AFC drawing and specifications.

4.6.8      All installation accessories shall be fixed in accordance with manufacture

Information and AFC typical drawings.

4.6.9      Fix PVC conduits with conduit clamps and seal the top end with non-hardening sealing compound

4.7 Testing Procedure

The test method shall be conducted for minimum requirements for all facilities before energization of the circuits applied as follows:

4. 7.1 Testing of Lighting & Small Power Receptacle System

4.7.1.1 Measurement of insulation resistance of complete lighting &                                     receptaclecircuits to ensure no leakage to earth (without lamps).

4.7.1.2 Measurement of the illumination levels using a Lumen meter & functional                 test to be performed to lighting fixtures.

4.7.1.3 The test shall be conducted by Electrical Supervisor, witnessed and                           recorded by the Electrical QC Inspector.

4.7.1.4 Check the maximum connected load in each circuit.

4.7.2  Testing of Distribution Panel board

4.7.2.1 Measurement insulation resistance of panel boards to ensure no leakageto earth.

Check the panel boards rating & branch circuits as per the design drawings & schedule.

·         Insulation resistance between phases and phase to ground for all branch circuits.

·         Verify the location of panel boards for the required minimum protection rating.

·         Check the breakers size & rating, breakers in correct phase & sequence and properly fitted.

·         Ensure proper identification of all wires & circuit breakers as per circuit diagram & directory.

·         Ensure bus bar & bus taps for tightness of bolts & connections.

·         Check the earthing resistance at earthing

Test results shall be recorded.

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