product construction
technical information for armored and unarmored, pcv and XLPE insulated power cables rated 600/1000 volts are provided conforming specifically to ies 60502-1, bs 6346 and bs 5476. however, additional
technical information for other cable designs (national, international or customer specifications) can be provided upon request.
conductors:
the current carrying component of the cable. the conductors in JNC cables are high conductivity copper or high purity Aluminum that complies with the requirements of iec 60228 and BS 6360, conductors flexibility
degrees are discribed as follows
* class1 (Solid conductor)
*class2 (Stranded conductor)
*class5(flexible conductor)
*class6(more flexibale conductor)
solid conductrs are preferrd for small sizes, whereas the stranded conductors should have a space factor, which together with chosen conductor section, results in good utilization of the cross sectional area of the cable. Accordingly, where possible, compacted circular conductor, or compacted sector-shaped conductors are used.
Insulation:
Cables are insulation either with PVC (Polyvinyl Chloride) or XLPE (Cross linked Polyethylene).
PVC Insulation:
PVC Insulation as per BS 7655 & IEC 60502-1 is a clean, easy to handle material with good electrical characteristics and resistance to water, oils and chemicals, together with inherent toughness and flexibility over a wide temperature range. PVC cables are easy to handle joints, terminations and have an outstanding record of trouble free service.
XLPE Insulation:
Cross linked polyethylene (XLPE) type GP8 as per BS 7655 and IEC 60502-1 requirements. XLPE matches many of the attributed of PVC, but at high temperature the toughness and physical properties are improved. Also, XLPE includes an enhanced resistance to deformation.
The continues current rating of XLPE insulated cables are based upon a maximum conductor temperature of 90C compared with 70C for PVC insulated Types.
Short circuit ratings are also higher, XLPE accepting 250C as a final conductor temperature at the end of short circuit compared with 160C for PVC insulated cables. As a result, in situations where conductor size is governed by current rating rather than voltage drop, it may be possible to use a smaller XLPE insulated conductor size.

INTRODUCTION
This over-head conductors catalogue includes all technical information aboutover-head conductors up to 380 kV, with Copper, Aluminum or ACSR (bare conductors), used in long distance Power Transmission and connections between cities. The size range of these conductors starts from 10mm2 up to 1000 mm2.
The Major Types Are:
AAC
1. General:
These Conductors are formed using several Electrical Conductors Grade Aluminum Wires having the same nominal diameter and stranded in concentric layers.
2. Properities:
Compared to Copper, these conductors have a great economical advantage on the low voltage overhead lines.
3. Application:
Low Voltage Lines.
Linking bridges between the dead-end clamps and the high voltage lines installed with aluminum conductors steel-reinforced.
High Voltage bus bars at the sub-stations.
4. AAC Conductors can be supplied, conforming to the following standards:
ASTM B231
BS 215 - Part 1
DIN 48201