This article is about Very High Voltage Cable Material Selection Guide & Technical Specification for commercial buildings, plants and refinery projects as per international codes and standards.
Voltage Cable Material QC Checking Points
| QC Before Installation- Very High Voltage Cable shall conform to all applicable requirements, standards, and specifications prior to release to be used as part of work. |
| Cable reels of Very High Voltage Cable shall be checked for damage by store yard personnel prior to acceptance of shipment, unloading, or handling. No visible shipping or handling damage. NEC 110.3B and Manufacturer’s Instructions |
| Very High Voltage Cable shall be new and unused. |
| Very High Voltage Cable shall be in accordance with the Saudi Aramco-approved project-specific design drawings, diagrams, schedules, lists, databases, and associated design documents. |
Very High Voltage Cable Material Selection Guide & Technical Requirements
| Very High Voltage Cable drums shall be compared with latest vendor drawings and project specifications. NEC 310.11 & NETA, ATS- 2007 Sec. 7.3.3 |
| Check that Vendor Installation Manual for Very High Voltage Cable handling is provided along with the shipment. NEC 310.11 |
| Power cables rated 69 KV and above, with solid dielectric insulation, shall comply with either AEIC CS6 (69 KV EPR insulated cable) or AEIC CS7 (69 KV and above XLPE insulated cable). |
| Insulation thickness shall be in accordance with the tables in these standards (e.g., 16.5 mm (650 mils) for 69 Kv rated cables and 20.3 mm (800 mils) for 115 KV rated cables), not reduced thickness based on maximum stress design. |
| Cables shall be marked to indicate the following information and shall be repeated at intervals not exceeding 1.0 m (40 in.). a) Rated Voltage b) Type of cable c) Manufacturer’s name, Trademark d) The AWG size or circular mil area NEC 310.11 Check that the end cap (seal) of cable is heat-shrinkable. NEC 110.3B |
Check that the cables are supplied from the acceptable manufacturers as listed in Section 6.2.
| Insulation thickness shall be in accordance with the tables in these standards (e.g., 16.5 mm (650 mils) for 69 kV rated cables and 20.3 mm (800 mils) for 115 KV rated cables), not reduced thickness based on maximum stress design. |
| Concentric neutral wire, metallic armor, and metallic sheaths shall be protected with a PVC or equivalent jacket. |
Minimum size of 69 kV conductors shall be 120 mm squared or 4/0. |
International Codes & Standards
| NFPA 70 — National Electrical Code (NEC), 2008 Edition |
| SAES-P-101 Regulated Vendors List for Electrical Equipment, 09 June 2007 |
| SAES-P-104 Wiring Methods and Materials 13 January 2008 |
| AEIC CS6 Specifications for Ethylene Propylene Rubber Insulated Shielded Power Cables Rated 5 through 69 kV |
| AEIC CS7 Specifications for Crosslinked Polyethylene Insulated Shielded Power Cables Rated 69 through 138 kV |
| AEIC CS8 Specification for Extruded Dielectric, Shielded Power Cables Rated 5 through 46 kV |