Copper Communication Cables

Parameters
conductor Size (mm)
0.4 0.5 0.63 0.9
conductor Resistance (per Km in Ohms.)
individual 135 ± 8 86 ± 6 58 ± 4 28 ± 2
conductor Resistance Unbalance (%)
individual 3 2.5 2 2
average 1.5 1 1 1
conductor Elongation (minimum %)
15 15 18 18
attenuation At 150 Khz (db/km) Shall Not Exceed
12 8.25 6.3 4.4
insulation Solid (mdpe/hdpe)
spark Test
3 Kv Rms Ac, 1 Spark per 5 K.m.
retraction of Insulation (shall Not Exceed) 2.5 Mm After 1 Min
resistance to Compression 200 N, 12 V Dc
insulation Resistance At 500v5000 Mega Ohm – Km
construction
10/20 Pair Units & 50/100 Pair Super Units of Sizes: 10 Pair to 2400 Pairs
filling Compound
water Resistant Compound (petro Jelly)
core
polyester Tape
moisture Barrier Poly – Aluminium
sheath / Jacket Ldpe
armouring Galvanised Steel Tape
armouring Bedding Pe Tape
mutual Capacitance (nf/km)
individual 52 ± 4.5
average 52 ± 3
capacitance Unbalance (pf/km)
individual 3000 Pf
average 750 Pf
far End Cross Talk (db) At 150 Khz, Better Than 67.8 Rms Indvl. 55 Rms
near End Cross Talk (db) At 150 Khz
better Than 55 Rms (individual Value)
pairs
from 5 Pairs to 2400 Pairs.