Direct burial of unarmored MV cables
Direct burial of unarmored MV cables
(OP)
I am designing 33 kV cabling system in a wind farm, can I go for direct burial of single core cables (unarmoured) without pipes? using fine sand as a back-fill and protective tiles?
any IEC reference?
any IEC reference?






RE: Direct burial of unarmored MV cables
-IEEE Std 525-1992, IEEE Guide for the Design and Installation of Cable Systems in Substations. ch.13.1 Direct burial
By the way, here it is mentioned as follows:
"This system has low initial cost, but does not lend itself to changes or additions, and provides limited protection against the environment. Damage to cables is more difficult to locate and repair in a direct burial system than in a permanent trench system."
-National Electrical Safety Code (NESC) /2007 Section 35.Direct-buried cable
-US AIR FORCE
http://armypubs.army.mil/eng/DR_pubs/dr_a/pdf/tm5_...
CH.7-5. Direct-Burial Cable Installations.
-U.K. DEFENCE ESTATES MINISTRY OF DEFENCE Specification 034 Electrical Installations. SECTION SIX - CABLE INSTALLATION
-DIN/VDE 0289 ,100,101
RE: Direct burial of unarmored MV cables
Regards
Marmite