MV Cable Termination and Splicing Special Work Procedure

This article is about MV Cable Termination and Splicing Special Work Procedure & Requirements of Medium Voltage Cable as per International Codes and standards for Commercial Buildings, Plants and Refinery Projects.

MV Cable Termination and Splicing Special Work Procedure

1. Medium Voltage Cable splicing / termination procedures shall be submitted for review a minimum of 30 days prior to the start of the activity.
2. 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, Annex A (A.18); GI 2.705
3. The cable splicer/terminator shall hold a valid Job Skills Training Department (JSTD) splicer certification card for Medium Voltage cable as per GI 2.705.
4. Cable splicers shall carry their certificates and JCC’s while working on the cable. GI 2.705
5. Design and installation of wiring and cable systems shall be in accordance with the NEC as supplemented by SAES-P-104.
6. The cable systems shall be in accordance with the regulated vendor list for equipment.
7. The manufacturers documentation for the Medium Voltage cable splicing / termination kit shall be reviewed for compatibility with Aramco standards and the cable being spliced / terminated. NFPA 70, NEC 110.3
8. IFC drawings for the Medium Voltage cable installation, specification of cable, location of cable jointing, and installation procedure for joints shall be submitted and reviewed. NFPA 70, NEC 110.3
9. The Medium Voltage cable which will be spliced / terminated, shall comply with 15-SAMSS-502 and shall be either IEC or ICEA/AEIC type cables.
10. IEC type medium voltage cables shall comply with IEC 60502-2, IEC 60332-3, with additional 15-SAMSS-502 requirements.
11. ICEA/AEIC type medium voltage cables shall comply with ICEA S-94-649 or S-97-682, AND AEIC CS8, with additional 15-SAMSS-502 requirements.
12. The Medium Voltage cable splicing / termination procedure shall include requirements as indicated in manufacturer’s recommendation for support and fastening. NFPA 70, NEC 110.3
13. The manufacturer’s recommended minimum bending radius of Medium Voltage cable to suit the installation shall be included. NFPA 70, NEC 110.3
14. The Medium 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. NFPA 70, NEC 110.3
15. Cables shall be permanently identified prior to the splicing/terminating process.
16. The Vendor Installation Manual requirements shall be incorporated into the installation procedure. NFPA 70, NEC 110.3
17. Compression (crimped) type connectors shall be used for splicing and terminating stranded conductors.
18. Compression terminal connectors for 4/0 and larger conductors shall be two hole NEMA design.
19. All compression connectors shall have a manufacturer’s reference compression die number and conductor size printed or stamped on the connector.
20. Cable manufacturers bolt torqueing requirements shall be included with the procedure. NETA ATS 2007, 7.3.3.1.3.2 & Table 100.12
21. The Medium Voltage cable manufacturers recommended field test voltage shall be included in the procedure.
22. Medium 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.
23. Medium voltage terminations installed indoors shall have a minimum creepage distance to ground of 25 mm per kV line-to-line nominal system voltage.
24. Integrity of electrical connections – After completion of splices and terminations, cables installed in manholes shall be racked. NFPA 70, NEC 110.12B.

International Standard and Codes for MV Cable Termination and Splicing

1. Non-Hazardous Indoor Enclosures, Installation and Pre-Commissioning
2. Boxes, Enclosures, and Accessories Materials Selection & Requirements
3. NFPA 70 National Electrical Code (NEC), 2008 Edition
4. SAES-P-104 Wiring Methods and Materials, 13 January 2008
5. AEIC CS7 Specifications of Cross-Linked Polyethylene Insulated Shielded Power Cable, December 93
6. General Instruction G.I. 2.705 Certification of High Voltage Cable Splicer, 09 February 2005