High Voltage Underground Cable Installation Standards

Standardisedcable installation depth to minimum cover of750 mm and maximum depth of 1500mm section 14 9 added section 14 10 clarified marker tape and protective cover requirements section 14 11 clarified cable sealing exposed cables and terminated cables requirements section 14 13 14 14 and 14 15.

High voltage underground cable installation standards. High voltage link boxes view pdf. The insulation method depends upon the type of cable used see section on underground cable technologies. A high voltage cable hv cable is a cable used for electric power transmission at high voltage a cable includes a conductor and insulation cables are considered to be fully insulated. Install a cable marking tape 250mm below the finished ground level covering each cable.

It may be increased at certain points for example road rail river and canal crossings to accommodate the more. High voltage 69kv power cable view pdf. Removed twisted conductor over house. To withstand the very high voltage.

High voltage 345 400kv power cable. Updated 480v to include 480 240v 3 wire. Company offices updated service center information page 5. High voltage underground transmission cable systems.

Underground cables because of the insulation and surrounding environment tend to retain the heat produced in the copper aluminium conductor. Article 403 clearances updated illustration 5b page 26. General cable s silec brand has been synonymous with maximum service life in high and extra high voltage underground transmission cabling systems up to 500 kv. Cables installed in ground shall be laid in a single horizontal layer spaced 450mm apart.

2 scope this manual has been developed for use by horizon power workers and service providers engaged in the installation of high and low voltage distribution cables on the horizon power electrical networks. High voltage aluminum cable clamps view pdf. This heat then has to be dissipated to the. Install a cable marker at each change in cable direction joint position and entry points to buildings.

1 2 10 2020 revision of the cnp service standards book effective date 3 16 2020 1. This means that they have a full rated insulation system which will consist of insulation semi con layers and a metallic shield. This document refers to other horizon power documents to provide reference standards for underground cable installation work.