CABLES. Cables of appropriate size to be used in the system shall have the following characteristics: a. Shall meet IEC 60227/IS 694, IEC 60502/IS1554 standards b. Temp. Range: –10oC to +80oC. c. Voltage rating 660/1000V d. Excellent resistance to heat, cold, water, oil, abrasion, UV radiation e. Flexible f. Sizes of cables between array interconnections, array to junction boxes, junction boxes to Inverter etc. shall be so selected to keep the voltage drop (power loss) of the entire solar system to the minimum (2%) g. For the DC cabling, XLPE or, XLPO insulated and sheathed, UV stabilized single core multi- stranded flexible copper cables shall be used; Multi-core cables shall not be used. h. For the AC cabling, PVC or, XLPE insulated and PVC sheathed single or, multi-core multi- stranded flexible copper cables shall be used; Outdoor AC cables shall have a UV-stabilized outer sheath. i. The cables (as per IS) should be insulated with a special grade PVC compound formulated for outdoor use. Outer sheath of cables shall be electron beam cross-linked XLPO type and black in colour. j. The DC cables from the SPV module array shall run through a UV stabilized PVC conduit pipe of adequate diameter with a minimum wall thickness of 1.5mm. k. Cables and wires used for the interconnection of solar PV modules shall be provided with solar PV connectors (MC4) and couplers. l. All cables and conduit pipes shall be clamped to the rooftop, walls and ceilings with thermo- plastic clamps at intervals not exceeding 50 cm; the minimum DC cable size shall be 4.0 mm2 copper; the minimum AC cable size shall be 4.0 mm2 copper. In three phase systems, the size of then eutral wire size shall be equal to the size of the phase wires .m. Cable Routing / Marking: All cable/wires are to be routed in a GI cable tray and suitably tagged and marked with proper manner by good quality ferule or by other means so that the cable easily identified. In addition, cable drum no. / Batch no. to be embossed/ printed at every one meter. n. Cable Jacket should also be electron beam cross-linked XLPO, flame retardant, UV resistant and black in colour. o. All cables and connectors for use for installation of solar field must be of solar grade which can withstand harsh environment conditions including temperatures, UV radiation, rain, humidity, dirt, salt, burial and attack by xxxx and microbes for 25 years and voltages as per latest IEC standards. DC cables used from solar modules to array junction box shall be ...
