Method Statement for Lightning /Earthing System Installation
Method Statement for Lightning /Earthing System Installation
LIGHTNING & EARTHING SYSTEM INSTALLATION
TABLE OF CONTENTS
- PURPOSE
- SCOPE
- REFERENCES
- RESPONSIBILITIES
- MAJOR PLANT & EQUIPMENT
- MATERIAL HANDLING
- CONSTRUCTION METHODOLOGY
- EQUIPMENT AND TOOLS
- PARTICULAR SAFETY PRECAUTIONS
- ATTACHMENT
- INSPECTION AND TEST PLAN – LIGHTNING/EARTHING INSTALLATION – Refer Relevant Blog
- LIGHTNING/EARTHING INSTALLATION CHECKLIST – Refer Relevant Blog Post
- LIGHTNING / EARTHING TEST RECORD – Refer Relevant Blog Post
- RISK ASSESSMENT
Detailed Method Statement for Lightning & Earthing System Installation
1.0 PURPOSE
1.1 To check that lightning protection/earthing system is adequate to comprise a complete system against damage by lightning and electrical fault. Limiting shock voltages for building, equipment and personnel safety, and that system lightning/earthing fault return is low enough to prevent building, equipment damage and personnel safety during lightning and electrical fault conditions.
1.2 To test the earthing and/or supplementary earth has an earth resistance, which does not exceed the sum (ohms) as detailed in the Project Specification and Latest Codes of Practice.
2.0 SCOPE
2.1 This procedure shall apply during the installation/testing of all lightning and earthing systems.
3.0 REFERENCE
3.1 Site Safety Plan
3.2 Project Manuals, Project Specifications
3.3 BS-62305:2006-III,IV,50164,6651 and BS-7430 (where applicable)
3.4 Contractor – Quality Control Work Procedure
3.5 Contractor – Electrical Work Procedure
3.6 Contractor – Quality Plan
3.7 Approved Installation drawings (As applicable)
3.8 Approved Material Submittal (As applicable)
4.0 RESPONSIBILITIES
4.1 Supervisor / General Foreman
4.1.1`Implementation of safe work method statement and risk assessment plan.
4.1.2 Arrange TBT prior to commencement of work.
4.1.3 Visit the area of work for no hazard items exist.
4.1.4 Organizing the site and work places so as to ensure that work is carried out to the required standard, with minimum risk to men, equipment and materials.
4.1.5 Ensure that the employees under his responsibility do not engage in unsafe work practices or take unnecessary risks.
4.2 Safety Officer
4.2.1 Enforce the Project HSE rules and regulation.
4.2.2 Implement HSE requirements as set out in Mercury HSE Plan
4.2.3 Ensure work permit has been obtained and implemented if applicable.
4.3 Tradesmen / Drivers / Operators / Welders
4.3.1 Follow Supervisor’s / General Foreman’s instructions.
4.3.2 Only authorized drivers / operators can operate the plants.
4.3.3 Only authorized welders can operate welding plants.
5.0 MAJOR PLANT & EQUIPMENT
5.1 All equipment/tools shall be inspected prior to use at site and Company Name ID tag shall be placed on equipment where applicable.
5.2 No modified tools may be used for any task.
5.3 All test equipment shall be checked to assure that they are in good condition and valid calibration certificates are maintained and available for review.
5.4 Operator’s documentation shall be verified as applicable.
6.0 MATERIAL HANDLING
6.1 All materials shall be submitted for approval prior to procurement and delivery to site.
6.2 Materials shall be inspected on delivery to site, to ensure compliance with the approved submittal. An Over, Shortage & Damage report shall be completed for all deliveries.
6.3 Materials shall be unloaded in a proper manner, by manual or as necessary, mechanical means, crane or forklift. Materials shall not be dropped to the ground, but lowered carefully.
6.4 Materials will then be reconciled with the mill certificates, where applicable and any uncertified /non-compliant materials will be removed into quarantine.
6.5 Material shall be stored appropriately or placed on shelving within the warehouse area.
6.6 All materials shall be stored on shelves within the warehouse and shall be segregated according to size and type.
6.8 Care shall be taken to prevent the ingress of dirt or foreign objects into materials.
6.9 Insulation materials shall be stored in the manufacturers packing to ensure it is maintained in a clean dry condition.
6.10 Items requiring preservation and maintenance shall be subject to the requirements of the Preservation and Preventative Maintenance Procedure.
6.11 Manufacturer’s instructions with regard to storage requirements shall form the basis for material storage and preservation.
7.0 CONSTRUCTION METHODOLOGY
7.1 QUALITY CONTROL:
7.1.1 The QC Inspector shall ensure all materials for lightning protection; earthing, earth pits with covers, green/yellow coloured insulated earth wire and accessories conform to the applicable Project Specification and Latest Codes of Practice, Shop Drawings and Purchase Order as defined by the work procedure “Material Receiving Inspection”.
7.1.2 The QC inspector shall ensure all detail manufacturer data sheets on all components; accessories and miscellaneous equipment for lightning protection are to be used in the installation.
7.1.3 The QC inspector shall ensure all copper/earth conductor installation are secured and properly fastened.
7.1.4 The copper/earthing conductor shall be as specified in approved Shop Drawings, Specification and Code. The lightning/earthing conductor shall be protected against damage where the conductor emerges from below grade.
7.1.5 The copper/earthing conductor shall be sized in accordance with Specification and Code.
7.1.6 All medium voltage service entrance, main service switch and distribution switchboard equipment, transformers, motors, panel boards and all related metallic equipment shall be effectively earthed in an approved manner.
7.1.7 All exposed non-current carrying metal parts of equipment and other sizable metallic objects such as Electrical Panels, Switchgears, AHU’s, ACCU’s, plumbing pipes etc. shall be potentially bonded to the earthing grid accordingly.
7.1.8 Conduit, cable tray/trunking, cable wire armored, or cable shields shall not be the sole means of earthing equipment. A separate earthing conductor shall be installed within the same conduit, cable tray or otherwise shall accompany the power conductors. Metallic conduits, cable trays/trunking shall be bonded to earth grid.
7.1.9 The copper/earth conductor installation shall not conflict with other installations.
7.1.10 All lightning/earthing joints and connections shall be as per manufacturer’s recommendation, approved drawings, specification and code.
7.1.11 Where using cad weld joints and connection shall be approved by the clients and as per manufacturer recommendation.
7.1.12 Inspection test pits shall be accessible, clearly marked and identified.
7.1.13 Earth electrodes shall be as per Specification and Latest Codes of Practice.
7.2 CONSTRUCTION ACTIVITIES
7.2.1 Installation shall be in accordance with approved Shop Drawings, Specification and Latest Codes of Practice.
7.2.2 All lightning/earthing installations shall be left exposed until inspections have been completed to ensure installations are properly secured and fastened.
7.2.3 The correct size moulds for joints and connection shall be used when performing cad weld activities
7.2.4 All lightning/earthing connections shall be as per Approved Shop Drawing Details, Specification and Latest Codes of Practice.
8.0 EQUIPMENT & TOOLS
8.1 Exothermic welding mould and accessories.
8.2 Multimeter
8.3 Earth electrode tester.
8.4 Hand tools.
9.0 PARTICULAR SAFETY PRECAUTIONS
The contents of this method statement shall form the basis of a toolbox talk for all operatives before the commencement of such works.
9.1 RISK ASSESSMENT
– Danger of hand or other injuries from cutting tools and sharp edge
– Danger of falls from heights.
– Falls, knocks or trips due to poorly lit areas within the structure.
– Danger of eye damage during cutting or grinding.
– Electrocution when using electric hand tools and extension leads.
– Danger of injury when lifting large duct sections.
9.2 RISK MANAGEMENT
9.2.1 Only trained operatives shall use such cutting tools as required to carry out the works. All operatives, skilled and unskilled shall be provided with gloves for hand protection.
9.2.2 All operatives shall be provided with full body safety harnesses when working at heights above two (2) meters as set out in this method statement.
9.2.3 Main contractor shall provide temporary lighting as required in areas subject to poor lighting.
9.2.4 When cutting or grinding all operatives shall wear a full face visor. All other operatives in the general area of such work shall be made aware and avoid such areas.
9.2.5 All hand tools and extension leads shall be inspected before use to ensure they are in good working order, with no damaged or exposed elements. Leads shall be checked along their full length and plugs and sockets shall be of the correct type and rating.
9.2.6 Where scaffolding is required to be installed for the lightning/earthing installation, a Green Tag shall be attached to the scaffolding to identify that the scaffolding has been inspected and can be used for construction purposes.
10.0 ATTACHMENT
10.1 Inspection and Test Plan No. 001 – Lightning/Earthing Installation – Refer Relevant Blog
10.2 Quality Record No. 001 – Lightning/Earthing Installation – Refer Relevant Post
10.3 Test Record No. 002 – Lightning/Earthing Test Record – Refer Relevant Post
10.4 Risk Assessment No. 002- Lightning/ Earthing Test Record – Refer Relevant Post
