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This article is about High Voltage Cable Termination and Splicing Special Work Procedure & Requirements of Electrical Power System as per International Codes and standards for Commercial Buildings, Plants and Refinery Projects.
High Voltage Cable Termination and Splicing Special Work Procedure
General Requirements
- High Voltage Cable splicing / termination procedures shall be submitted for review a minimum of 30 days prior to the start of the activity. These documents shall at a minimum contain the check points listed below.
- The Personnel Qualification Procedure for High Voltage Cable splicing / termination shall be submitted for review and approval a minimum of 30 days prior to the start of the activity.
- The cable splicer/terminator shall hold a valid Power Distribution Department splicer certification card for High Voltage cable as per GI 2.705.
- Personnel Qualification request for approval shall be submitted 30 days prior to the start of the work. The contractor shall request a Job Clearance Card (JCC) issued by Inspection Department prior to commencement of splicing. SAEP-1150 A.18; GI 2.705.
- Cable splicers shall carry their certificates and JCC’s while working on the cable. GI 2.705
- Design and installation of wiring and cable systems shall be in accordance with the NEC as supplemented by SAES-P-104.
- The cable systems shall be in accordance with the regulated vendor list for equipment.
- The manufacturers documentation for the High Voltage cable splicing / termination kit shall be reviewed for compatibility with Aramco standards and the cable being spliced / terminated. NEC 110.3B
- IFC drawings for the High Voltage cable installation, specification of cable, location of cable jointing bays, link boxes and installation procedure for joints shall be submitted and reviewed. NEC 110.3B
- The manufacturer’s recommended minimum bending radius of High Voltage cable to suit the installation shall be included. NEC 110.3B
- The High Voltage cable splicing / termination procedure shall include requirements for environmental control including provisions for climate control, air conditioning, totally enclosed splicing enclosures, be free from dust and wind, and other requirements as indicated in manufacturer’s recommendation. NEC 110.3B
- Cables shall be permanently identified prior to the splicing/terminating process.
- The High Voltage cable splicing / termination procedure shall include requirements as indicated in manufacturer’s recommendation for support and fastening. NEC 110.3B
- The High Voltage cable which will be spliced / terminated, shall comply with AEIC CS7 or AEIC CS6.
- The Vendor Installation Manual requirements shall be incorporated into the installation procedure. NEC 110.3B
- Compression (crimped) type connectors shall be used for splicing and terminating stranded conductors.
- Compression terminal connectors for 4/0 and larger conductors shall be two hole NEMA design.
- All compression connectors shall have a manufacturer’s reference compression die number and conductor size printed or stamped on the connector.
- Cable manufacturers bolt torqueing requirements shall be included with the procedure.
- The High Voltage cable manufacturers recommended field test voltage shall be included in the procedure.
- High voltage terminations (operating at 2.4 kV and above) installed outdoors shall have a minimum creepage distance to ground of 40 mm per kV line-to-line nominal system voltage.
- High voltage terminations installed indoors shall have a minimum creepage distance to ground of 25 mm per kV line-to-line nominal system voltage.
- After completion of splices and terminations, cables installed in manholes shall be racked. NEC 110.12B.
International Standard and Codes for Low Voltage IEC Armored Cable
- Non-Hazardous Indoor Enclosures, Installation and Pre-Commissioning.
- Boxes, Enclosures, and Accessories Materials Selection & Requirements.
- SAEP-1150 Inspection Coverage on Projects (06/30/2004).
- NFPA 70 National Electrical Code (NEC) 2008 Edition.
- SAES-P-104 Wiring Methods and Materials, 13 January 2008.
- AEIC CS7 Specifications of Cross-Linked Polyethylene Insulated Shielded Power Cable, December 93.
- General Instruction G.I. 2.705 Certification of High Voltage Cable Splicer (02/09/2005).