Electrical Engineering

ELECTRICAL EQUIPMENT INSTALLATION PROCEDURE

1. All permanent materials (including fabricated and pre-fabricated supports), consumables, equipment to be installed and its accessories, construction area and resources shall be prepared and checked prior to installation works.
2. Ensure that working areas are safe and ready for installation in coordination with other discipline for the use of the area and scaffolding materials.
3. Work Transfer Sheet shall be duly signed and processed by other subcontractors or discipline for the preceding works to avoid confusion and discrepancies in the work responsibilities.
4. Study erection procedures of heavy electrical equipment and other sensitive equipment prior to installation.
5. Special tools shall bear a valid calibration certificates traceable to a national standard indicating calibration validity and periodically (at least six months) checked by a third party laboratory testing facility.
6. Electrical materials shall conform to all applicable requirements, standard, and specifications prior to release to be used as part of the work. Refer to Schedule “Q” Att. IV Para 7.1.
7. Review all references such as the latest approved for construction drawings, layout, and Technical Scope of Work.
8. All equipment related to substation works shall be checked after confirming the availability at company. Visual Inspection shall be conducted for possible factory or handling damage and recorded in appropriate QC Material Receiving Inspection Report form.

STORAGE AND HANDLING OF EQUIPMENT INSTALLATION PROCEDURE

1. Upon delivery of materials,  QC Inspector will conduct receiving inspection as per Schedule G for Handling and Preservation to verify conformance to vendor drawings. Any deviation shall be documented through a QCIR.
2. Electrical equipment should be moved and stored in an upright position
3. Electrical equipment should be stored indoor in a clean dry area as per NFPA 70, NEC Art.110.3 (B) & manufacture recommendation.
4. Keep sufficient gap between stored materials and equipment for easy access, lifting and moving.
5. Electrical Equipment should be covered with plastic sheets and all doors should be sealed tight. All equipment parts must be kept in the unopened original shipping case with all braces and plugs intact and shall be covered with plastic sheets.
6. Air intake openings should remain covered to reduce dust, waster or other unwanted entry accumulation.
7. Regular visual inspection shall be conducted to check any dust accumulation or dampness on the electrical equipment.
8. Necessary protection shall be provided in transporting of electrical equipment in accordance with vendor requirements or recommendations and Saudi Aramco standard and specifications.

Read more

WORK PROCEDURE FOR SPLICING AND TERMINATION OF LOW VOLTAGE CABLES

GENERAL PREPARATORY WORKS (SPLICING & TERMINATION)

1. All permanent materials, consumables, equipment to be installed and its accessories, construction area and resources shall be prepared and checked prior to installation works.
2. Work Transfer Sheet shall be duly signed and processed by other subcontractors or discipline for the preceding works to avoid confusion and discrepancies in the work responsibilities.
3. Special tools shall bear a valid calibration certificates traceable to a national standard indicating calibration validity and periodically (at least six months) checked by a company approved third party laboratory testing facility.
4. Electrical materials shall conform to all applicable requirements, standard, and specifications prior to release to be used as part of the work. Refer to Schedule “Q” Att. IV Para 7.1.
5. Review all references such as the latest approved for construction drawings, layout, and Technical Scope of Work. Personnel Qualification request for approval shall be submitted 30 days prior to start of the work per Schedule Q para. Attachment IV para 2.1.
6. Personnel who will perform the termination and splicing shall be approved terminator by the client.
7. Design and Installation of Wiring and Cable Systems shall be in accordance with the NEC as supplemented by SAES-P-104 and/ or as approved Saudi Aramco Standards.
8. Cables shall be permanently identified prior to the Splicing / Termination process; Ref SA Std. SAES-P-104 6.10.
9. The Vendor Instruction Manual requirements shall be incorporated into the installation procedure. NEC 110.3B; Ref SA Std. SAES-P-104 4.1.
10. All Compression Dies / Connectors shall have a Manufacturer’s Reference compression die number and conductor size normally printed or stamped on the connector as required as SAES-P-104 Para. 6.1.

INSTALLATION WORKS OF CABLES

1. Low voltage cable with damaged outer jacket should be cleaned and free from accumulation of dust, oil, and moisture using required cable cleaning spray and materials.
2. Make sure that the Low voltage cable with damaged portion is free of sharp edge in order to avoid damage when new wrapped around jacket sleeve is installed.
3. New wrapped around cable sleeve should be checked if it is cleaned and free from accumulation of dust, oil and moisture. Cleaned the new cable sleeve when required.
4. In the damaged portion, wrap around the cable of 3M electrical tape, after then wrap the cable with rubber tape and again wrap the cable of 3M electrical tape.
5. Degrease the ends of the over sheath (new wrapped around cable repair sleeve) for a length of about 150 mm.
6. Put heat shrink sleeve in centre position and shrink on according to manufactures instruction.
7. Repeat the Installation Activities Procedure on other portion of medium voltage cable with damaged outer jacket.
8. Repair of damaged outer jacket of LV Cable shall be as per Manufacturer’s Instructions per NEC 110.3.
9. All Low Voltage cables shall be installed as per the Company requirement.
10. Cable shall not be bent sharp to a small radius handling or installation, for cables the minimum bending radius for PVC/XLPE cables shall be 12 times the overall diameter of Cable.
11. The ends of lead sheathed cable shall be sealed with solder immediately after cutting the cables, in case of PVC cable suitable sealing compounds/ tape shrinkable caps shall be used.

Read more