Telephone & Switchboard Cables: Application | Product Range | Technical Data
APPLICATION
PVC insulated and PVC sheathed Telephone and Switch Board cables with solid annealed tinned
copper conductors are widely used as ‘indoor’ cable.
The paired cables, with or without shielding, are widely used indoor, in switchboards panels, for
effective short range low frequency signals.
The installation of cable with switch board back panels, intercom systems and intercom jumpers, in
Multi storey buildings, Hotels, Business installations, Residential complexes, etc., offers very low
cross talk and very low attenuation, conforming to ITD specification G/WIR-06/02 May 97 and
customer standard.
RODUCT RANGE
1A. Ravicab Manufactures PVC insulated Switch Board Jumper wires with high conductive
annealed solid
tinned copper conductors of conductivity >100% and copper purity >99.97%, with
conductor
diameters of 0.5 mm and 0.6 mm..
1B. Ravicab Manufactures PVC insulated twisted pairs of Switch Board Jumper wires with high
conductive annealed solid tinned copper conductors, of conductivity >100% and copper
purity
>99.97%, with conductor diameters of 0.5 mm and 0.6 mm..
2. Ravicab Manufactures PVC insulated 2 pairs to 20 pairs Unshielded and overall PVC jacketed
Switchboard cables, with high conductive annealed solid tinned copper conductors, of
conductivity >100% and copper purity >99.97%, with conductor diameters of 0.5 mm and
0.6 mm.
Telephone & Switchboard Cables
1A. & 1 B. TECHNICAL DATA:- Jumper wires
Conductor : Annealed high conductive Electrolytic grade bare / tinned solid copper of
0.5 /0.6 mm diameter generally conforming to IS:8130-1984
Insulation : Hard grade specially designed PVC as per Type 2 of IS:13176:1991 suitable
for a conductor temperature upto 70ºC
Colour code : As per standard
Standard packing : 100 m / 500 m
Jumper
wire
Nominal diameter
of conductor
mm
0.5
0.6
1 core
1 core
Nominal cable diameter
1 core
1 pair
mm
mm
0.94
1.94
1.10
2.20
Maximum DC resistance of
Conductor at 20ºC
Ω/km
92.2
64.0
2. TECHNICAL DATA- Switch board cable
Conductor
: Annealed high conductive Electrolytic grade bare / tinned solid copper of
0.5 /0.6 mm diameter conforming to IS:8130-1984
Insulation : Hard grade specially designed PVC as per Type 2 of IS:13176:1991 suitable
for a conductor temperature upto 70ºC
Colour code : Pairs are colour coded as per Table 2 of G/WIR – 06/02
Pairing
: Cores paired as per colour codes with suitable lay to reduce the cross talk
Core Laying : Laid with suitable lay in Left hand lay and covered with poly ester tape
Rip cord
: Nylon rip cord is provided under the sheath for easy removal of sheath
Outer Jacket : Jacketed with PVC compound Type TM2 of IS:13176:1991 in grey colour
Standard packing : 100 m / 500 m
(Note: If armouring is required, it shall be provided as per IS:1554 - Part 1 )
COLOUR COMBINATION OF PAIRS
Pairs
1 pair
2 pairs
3 pairs
4 pairs
5 pairs
6 pairs
7 pairs
8 pairs
9 pairs
10 pairs
Main
colour
White
Red
Core colour
Blue
Blue, Orange
Blue, Orange, Green
Blue, Orange, Green, Brown
Blue, Orange, Green, Brown, Grey
Blue
Blue, Orange
Blue, Orange, Green
Blue, Orange, Green, Brown
Blue, Orange, Green, Brown, Grey
pairs
11 pairs
12 pairs
13 pairs
14 pairs
15 pairs
16 pairs
17 pairs
18 pairs
19 pairs
20 pairs
Main
colour
Black
Yellow
Core colour
Blue
Blue, Orange
Blue, Orange, Green
Blue, Orange, Green, Brown
Blue, Orange, Green, Brown, Grey
Blue
Blue, Orange
Blue, Orange, Green
Blue, Orange, Green, Brown
Blue, Orange, Green, Brown, Grey
Telephone & Switchboard Cables
PHYSICAL DIMENSIONS AND INSULATION / SHEATH MATERIALS
Pairs
size
1
2
3
4
5
10
15
20
Insulation
Material
Type 2
of
IS:13176/
1991
Thickness of
Insulation
mm
0.5
0.6
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
0.2
Sheath
Material
Thickness of Sheath
mm
Type TM2
of
IS:13176/
1991
ELECTRICAL DC RESISTANCE OF CONDUCTOR
Nominal
Maximum DC Resistance of
Nominal
wire dia
conductor at 20ºC
wire dia
0.5 mm
92.2 Ω/km
0.6 mm
0.5
0.5
0.65
0.65
0.65
0.65
0.75
0.75
0.75
0.6
0.5
0.65
0.65
0.65
0.65
0.75
0.75
0.75
Approx. Overall
diameter
mm
0.5
0.6
3.5
3.5
5.3
5.5
5.5
6.6
6.0
7.0
6.6
7.5
9.0
10.0
10.5
10.9
11.4
12.0
Maximum DC Resistance of conductor
at 20ºC
64.0 Ω/km