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Applications:
In MV energy distribution networks, for voltage systems 20 kV and 30 kV. Suitable in environments with high fire hazards risk when it's essential to guarantee the safety of people and goods. Tipically used in commercial areas, public premises, undergrounds and industries ambits with high concentration of persons or instrumental goods.
Installation:
In air. Directly or indirectly buried.
Marking (ink-jet):
NEXANS B YEAR ALSECURE 105 CEI 20-22 III CAT.C (or IEC 60332-3-24) RG7H1M1 Uo/U kV 1xS metric marking
Uo/U = 12/20 or 18/30; S = cross-section mm²
Notes:
Buried cables current ratings are calculated considering:
- metallic screens connected together and earthed on both extremities;
- ground thermal resistivity of 1,0 C m/W;
- laying depth of 1,0 m
- flat formation cables with interaxial distance of 2Dcable;
- trefoil formation cables in contact.
Screen cross sectional area 6 mm² (Rmax = 3,0 ohm/km at 20°C)
Possible aluminium conductor and/or pre-assembled three cores solution
HEPR = Hard Ethylene Propylene Rubber
HFFR = Halogen Free Fire Retardant
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