Field telephone cable

Product Description

7X0.28MM(3 Number of Zinc Covered Steel+4 Number of Tin Covered copper Strands)x2+2.3mmPolyethylene+Nylon+Double Wire (Twisted)

1.	Thickness of insulation (Polyethylene)	Minimum 0.35 mm
2.	Thickness of Polumide Jacket (Nylon)	0.15 mm (Average)
3.	Overall diameter of single conductor	Maximum 2.30 mm
4.	Breaking load for two wires conductor	Minimum 72 Kg
5.	Cutting load test	55 lb (Average)/25 Kg (Average)
6.	DC Loop Resistance	151 Ohm/Km (at 20°C)
7.	Insulation Resistance	2000 M Ohm/Km
8.	Dielectric Strength Test	1000 V AC (Minimum)
9.	Weight of Zinc Cover for each steel Strands	Minimum 25 gm/Kg
10.	Weight of Tin Covered for each steel Strands	8.75 – 24.8 gm/Kg
11.	No. Of Twist/M	14 – 16 Nos. (Average)

12.	Apparent Shape	Double Wire (Twisted)
13.	Color	Black
14	Conductors (Physical Characteristics)
	(a) Number of Strands	07 Nos
	(b) Number of Tin Covered copper Strands	04 Nos
	(c) Number of Zinc Covered Steel Strands	03 Nos
	(d) Diameter of each Stands	0.28 mm ± 0.01 mm