The ABC cables (aerial bunched) cable is a very novel concept in overhead power distribution, as compared with conventional bare conductor in overhead distribution system, AB cables provides higher safety, reliability, lower power losses and ultimate economy by reducing installation, maintenance and operative cost. This superior system is ideal for rural distribution and especially attractive for installation in difficult terrains such as highly areas, forest areas ,coastal areas etc
The phase conductor and neutral/street lighting conductors is of H2 or H4 grade aluminium complying with the requirements of IS 8130:1984 and conforms to flexibility class 2 of IS 8130:1984. The size of the street lighting conductor is 16 mm²
Messenger (Neutral Conductor or Otherwise):
The conductor is heat treated aluminium- magnesium-silicon alloy wire conforming to IS 398 (Part 4):1979.It is either stranded circular or compacted circular type and has minimum 7 strands with smooth surface.
The conductor is insulated with crosslinked polyethylene applied by extrusion. The insulation so applied fits closely on the conductor and it is possible to remove without damaging the conductor. The color of insulation is black, offering UV protection.
The phase conductors is provided with one, two or three ‘ridges’ and outer neutral insulated conductor, if provided, has four ‘ridges’ for quick identification. The street lighting conductor and messenger conductor (if insulated) does not have any identification mark.
Assembly (Laying up):
The required number of insulated phase conductors, one insulated neutral conductor (if required) and a street lighting conductor (if required) is twisted around the bare (or insulated) as required messenger conductor without fillers with a lay not exceeding 35 times the diameter of the insulated phase conductor. The direction of lay is right hand.
- In power theft prone areas
- As replacement of bare lines in rural areas, in woods, other localities & narrow street where space is limited
- As replacement of bare lines where reliability of supply is of prime importance and where high degree of stability of supply voltage is of importance.
- In hilly terrains where cost of erection of overhead lines of under ground cable becomes very high.
- As reinforcement of existing system without increasing voltage.