GENERAL This
specification covers the requirements of jumper
wire used for cross connecting purposes and
main distribution frame wiring by The Telephone
Organization of Thailand (TOT).
CONSTRUCTION
: Conductor : Tinned annealed copper
wire, 0.50 and 0.65 mm. (24, 22 AWG)
in size.
Insulation : Color coded or polyvinyl
chloride.
Twisted Pairs : The insulated conductors
are twisted into pairs, or triple with
specified color combinations to provide
pair identification.
Identification of conductor : The insulation
of conductor shall be coloured as follows
:
No.
Of cores nominal
Conductor
Diameter : 0.5 mm
Conductor
Diameter : 0.65 mm
Overall
Dia.(mm)
Standard
Length
Overall
Dia.(mm)
Standard
Length
2
3
4
5
2
3
3
3
200
200
200
200
3
3
4
4
200
200
200
200
Total
number of conductor in wire
Construction
Dia
(mm)
Colour
of Insulation
Length
Std
Pkg.
1
Single
0.50
Green
2
Pair
0.50
Black
and Yellow
200
1 coil
2
Pair
0.65
Red
and White
200
1 coil
3
Triple
0.50
Red
and White and Green
Tolerance
+1%
ELECTRICAL
CHARACTERISTICS : TJV
1. Conductor resistance when measured at or
corrected to 20 °C.
0.5
mm. = 95.1 Ohm/km.
0.65
mm. = 60.7 Ohm/km.
2. Insulation resistance when measured on
10 m. of single wire.
(Immersed
in water) = 200 Megohm-km.
3. The dielectric of each insulated wire to
all other wires.
(Immersed
in water) = 1.0 kv (AC) 3 seconds.
