This Procedure is applicable to all electrical item installation activities at site, which are to be installed on the [PROJECT TITLE & LOCATION].To ensure that all electrical installation is carried out safely, and in accordance with good working practice, as per [PROJECT TITLE & LOCATION], job specifications. This procedure is intended to provide general application guidance and establish controls during preparation and installation.
Grounding and Lightning Protection Installation
1 Grounding system cables, rods, and other related accessories must be installed as indicated on IFC drawings.
2 Prior to trenching for underground installations or the driving of grounding electrodes, excavation permits should be completed and approved by OWNER to ensure that the locations of underground interferences or hazards have been considered.
3 During excavation for grounding system, it should be done in accordance of an approved Procedure for Earth Excavation.
4 Main grounding wire which is 95mm² bare stranded and soft drawn tinned copper conductors must be buried of at least 600mm below finished grade, and of at least 300mm below concrete paved areas. It should be noted that for every main grounding wire crosses the maintenance way is to be enclosed or supported with 1 inch PVC conduit or otherwise specified.
5 The first connection should be made to the grounding electrode. Prior to driving, it should be verified that the final backfilling and compaction has already been completed.
6 Ground electrode should be copper or copper-clad steel having a minimum length of 3,048mm (10ft) long and a diameter of 19mm (¾ inch) or as per typical installation detail. A high silicon rod is specified or intended only on the cathodic protection of tank as per indicated on IFC drawings.
7 For multiple grounding electrodes of the same grounding system, i.e. instrument system grounding, it should be spaced by 3.5 meters apart minimum, or otherwise specified on IFC drawings.
8 Upon driven electrodes unto ground, a bore hole is required. It should be at a minimum depth of 3 meters. Backfilling of its native fill is recommended.
9 Connect ground electrode to the main ground loop.
10 Any buried connection should be exothermic welded type. To be more specific, it should be CADWELD or equivalent.
11 For guidance herein, are steps to be performed using exothermic welding (CADWELD).
- 11.1 Prior to make a connection, the detailed instructions and safety precautions provided by the manufacturer should be read and understood properly.
- 11.2 Clean the conductors with an approved cleaning solvent, if required.
- 11.3 Placed cables on mold and closed the handles to lock the mold (observed spacing for cables).
- 11.4 Drop metal disk and weld metal into the mold.
- 11.5 Closed the cover and ignite.
- 11.6 Open cover after metal solidifies.
- 11.7 Removed slug from the mold in preparation for the next connection.
13 The main grounding cables on above ground should be 95mm² color green PVC insulated & stranded copper conductor and should be enclosed and protected by 1 inch PVC schedule 40.
14 It has been stated herein (EO2-GO1 page 25), that the minimum grounding cable size above ground shall be 6mm², but in our recent project we are using 16mm² minimum as per IFC General Notes. So therefore, all throughout the process we should used 16mm² color green PVC insulated & stranded copper conductor and should also be enclosed and protected by a minimum of ¾ inch PVC schedule 40.
15 Approved compression type connectors should be used on above ground connections.
16 Connect all equipment, machines, tanks, cable trays and others to be grounded provided that all the miscellaneous materials to be used or installed are in accordance with an approved typical installation details & specifications. Location of connection / installation should be based on approved IFC drawings.
17 For lightning protection system, the working procedure is the same as what grounding system did provided that all details in installation should be in accordance with an approved typical installation details & specifications. Location of connection / installation should be based on approved IFC drawings.
18 All lightning protection ground loop should be bonded to electrical grounding system.
19 Herewith, some notes to be remembered in installing grounding system all throughout the process.
- 19.1 All stubs up conduit should be sealed with an approved conductive sealant after installation (refer to para 5.3 - conduit installation).
- 19.2 All equipment and structure grounding connections are to be painted with corrosive resisting paint, immediately after installation.
21 After installation, the grounding system and electrodes should be tested to ensure conformance to the maximum grounding resistance requirements as per attached Table 1. Notify OWNER if test results are not satisfactory.
22 Following completion of installation, submit “Request For Inspection” (RFI) to site QC Section, indicating scheduled time / date for inspection.
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1. General Requirements
2. Grounding and Lightning Protection Installation {this article}
8. Electrical Lighting Fixture Installation
9. Aircraft Warning Light Installation
10. Transformer Installation
11. Motor Control Center
12. Switchgear
13. Metal Enclosed Bus Duct
14. Batteries, Battery Chargers, and UPS System
15. Oil Processing and Filing of Power Transformer
9. Aircraft Warning Light Installation
10. Transformer Installation
11. Motor Control Center
12. Switchgear
13. Metal Enclosed Bus Duct
14. Batteries, Battery Chargers, and UPS System
15. Oil Processing and Filing of Power Transformer
Also includes: Applicable Codes & Standards, Responsibilities, Quality Control and Assurance, and Safety & Precautions.
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